Animal Husbandry Questions in English

(D) Inbreeding refers to the mating of more closely related individuals within the same breed for $4-6$ generations.
$1$. It increases homozygosity,which is necessary if we want to evolve a pureline in any animal.
$2$. Inbreeding exposes harmful recessive genes that are eliminated by selection.
$3$. It also helps in the accumulation of superior genes and the elimination of less desirable genes.
$4$. However,continued inbreeding,especially close inbreeding,usually reduces fertility and productivity.
Option $D$ is technically incorrect because the phrasing in the original option was grammatically flawed and misleading regarding the process of selection; however,in the context of standard biology questions,all statements $A, B,$ and $C$ are standard facts. Upon review,the statement in option $D$ is often presented as a benefit,but the question asks for the incorrect statement. Actually,all statements $A, B, C,$ and $D$ are generally considered correct in the context of animal breeding theory. If forced to choose,option $D$ is the most poorly phrased,but scientifically,inbreeding does help in the accumulation of superior genes.

(A) The average fat content in buffalo milk is approximately $7.2\%$.
This value is significantly higher than the fat content found in human milk or cow milk.
In contrast,human milk contains a higher concentration of lactose compared to both cow and buffalo milk.

(N/A) Humans knew from as early as $8000-1000$ $B.C.$ that one of the causes of variation was hidden in sexual reproduction.
They exploited the variations that were naturally present in the wild populations of plants and animals to selectively breed and select for organisms that possessed desirable characters.
For example,through artificial selection and domestication from ancestral wild cows,we have well-known Indian breeds,e.g.,$Sahiwal$ cows in $Punjab$.
We must,however,recognise that though our ancestors knew about the inheritance of characters and variation,they had very little idea about the scientific basis of these phenomena.

(N/A) Animal husbandry is the agricultural practice of breeding and raising livestock. It plays a crucial role in human welfare through the following ways:
$1$. Food Production: It provides essential nutritional products such as milk,meat,eggs,and honey,which are vital for human health.
$2$. Economic Contribution: It supports the livelihood of millions of farmers and contributes significantly to the national economy.
$3$. Raw Materials: It provides raw materials for industries,such as wool from sheep,silk from silkworms,and leather from hides.
$4$. Scientific Management: By applying scientific principles of breeding,feeding,and disease control,it ensures a sustainable and high-quality supply of animal products to meet the demands of the growing human population.

(N/A) Dairy farm management deals with processes that aim at improving the quality and quantity of milk production.
$1$. Selection of improved breeds: Choosing high-yielding and disease-resistant cattle breeds is crucial for productivity.
$2$. Proper nutrition: Cattle should be provided with a balanced diet consisting of roughage,fibre concentrates,and adequate proteins and nutrients.
$3$. Proper shelter: Cattle should be housed in well-ventilated sheds to protect them from harsh weather conditions like heat,cold,and rain.
$4$. Hygiene and health care: Regular cleaning,bathing,and brushing of cattle are essential to prevent diseases. Additionally,periodic veterinary check-ups are necessary to monitor health and detect symptoms of diseases early.

(N/A) breed is a group of animals related by descent and similar in most characters like general appearance,features,size,configuration,etc.
Objectives of animal breeding:
$1$. To increase the yield of animals (e.g.,milk,meat,eggs).
$2$. To improve the desirable qualities of the animal produce (e.g.,higher fat content in milk,better quality of wool).
$3$. To produce disease-resistant varieties of animals to reduce losses due to infections.

(B) Animal breeding is the practice of mating individuals to improve desired traits. The methods are classified as follows:
$(a)$ Natural methods: These include inbreeding (mating within the same breed) and out-breeding (mating between different breeds or species). Out-breeding is further divided into:
$1$. Out-crossing: Mating within the same breed with no common ancestors for $4-6$ generations.
$2$. Cross-breeding: Mating between different breeds of the same species to produce a hybrid.
$3$. Interspecific hybridization: Mating between different species.
$(b)$ Artificial methods: These include modern techniques like:
$1$. Artificial Insemination: Semen collected from a superior male is injected into the reproductive tract of a female.
$2$. Multiple Ovulation Embryo Transfer Technology $(MOET)$: $A$ technique where hormones are used to induce super-ovulation,followed by artificial insemination and embryo transfer to surrogate mothers.
The best methods are the artificial methods,specifically $MOET$. These are superior because they are scientific,overcome the limitations of natural mating,allow for the rapid multiplication of superior genetic traits,and are highly economical as a single male's semen can be used to inseminate many females.

(N/A) Animal husbandry is the agricultural practice of breeding and raising livestock. It is a vital skill for farmers and is as much science as it is art.
Animal husbandry deals with the care and breeding of livestock like buffaloes,cows,pigs,horses,cattle,sheep,camels,and goats that are useful to humans.
It also includes poultry farming and fisheries. Fisheries include the rearing,catching,and selling of fish,molluscs (shell-fish),and crustaceans (prawns,crabs,etc.).
Since time immemorial,animals like bees,silkworms,prawns,crabs,fishes,birds,pigs,cattle,sheep,and camels have been used by humans for products like milk,eggs,meat,wool,silk,and honey.
It is estimated that more than $70$ percent of the world's livestock population is in India and China. However,the contribution to the world's farm produce is only $25$ percent,indicating that the productivity per unit is very low.
In addition to conventional practices of animal breeding and care,newer technologies must be applied to achieve improvements in quality and productivity.
- Animal husbandry has been a part of human civilization's development from the beginning.
- It remains a necessary element for producing food for humankind.
- $A$ professional approach to traditional farm management practices provides a much-needed boost to food production.

(N/A) Dairying is the management of animals for milk and its products for human consumption.
In dairy farm management,we deal with processes and systems that increase yield and improve the quality of milk.
Milk yield is primarily dependent on the quality of breeds in the farm.
Selection of good breeds having high-yielding potential combined with resistance to diseases is very important.
For the yield potential to be realized,the cattle have to be well looked after; they must be housed well,provided with adequate water,and maintained disease-free.
The feeding of cattle should be carried out in a scientific manner with special emphasis on the quality and quantity of fodder.
Besides,stringent cleanliness and hygiene are of paramount importance during milking,storage,and transport of the milk and its products.
Nowadays,many of these processes have become mechanized,which reduces the chance of direct contact of the produce with the handler.
Ensuring these stringent measures requires regular inspections with proper record-keeping. It also helps to identify and rectify problems as early as possible.
Regular visits by a veterinary doctor are mandatory.

(B) The phenomenon described is known as 'Inbreeding Depression'.
Inbreeding increases homozygosity,which allows harmful recessive alleles to pair up and express their deleterious effects in the progeny.
This accumulation of harmful recessive genes leads to a reduction in fertility and overall biological vigour over successive generations.

$(A)$ Mating of closely related individuals within the same breed is known as Inbreeding $(4)$.
$(b)$ Mating of animals of the same breed but having no common ancestors on either side for $4-6$ generations is known as Out-crossing $(3)$.
$(c)$ Mating of animals of two different species is known as Interspecific hybridization $(2)$.
$(d)$ Breeding of animals belonging to different breeds is known as Cross breeding $(1)$.
Therefore, the correct matching is $(a-4, b-3, c-2, d-1)$.

(N/A) Dairying is the management of animals for milk and its products for human consumption.
$(i)$ In dairy farm management,we deal with the processes and systems that increase yield and improve quality of milk. Milk yield is primarily dependent on the quality of breeds in the farm.
$(ii)$ Selection of good breeds having high yielding potential (under the climatic conditions of the area),combined with resistance to diseases is very important.
$(iii)$ For the yield potential to be realised,the cattle have to be well looked after; they have to be housed well,should have adequate water,and be maintained disease-free.
$(iv)$ The feeding of cattle should be carried out in a scientific manner,with special emphasis on the quality and quantity of fodder.
$(v)$ Besides,stringent cleanliness and hygiene (both of cattle and the handlers) are of paramount importance during milking,storage,and transport of the milk and its products.

(N/A) breed is a group of animals related by descent and similar in most characters like general appearance,features,size,configuration,etc. It is developed through selective breeding by humans. Example: $Hisardale$ is a breed of sheep developed by crossing Bikaneri ewes and Marino rams.
$A$ species is a group of organisms that are capable of interbreeding and producing fertile offspring,and are reproductively isolated from other such groups. Example: $Panthera$ $leo$ (lion) and $Panthera$ $tigris$ (tiger) are distinct species.

(N/A) In animal husbandry,pure lines are created through a process called inbreeding.
Inbreeding involves the mating of more closely related individuals within the same breed for $4$ to $6$ generations.
This process increases homozygosity,which is essential for the development of pure lines.
Continued inbreeding helps in the accumulation of superior genes and the elimination of less desirable genes,although it may also lead to inbreeding depression if continued for too long.

(N/A) breed is defined as a group of animals related by descent and similar in most characters,such as general appearance,features,size,and configuration. These animals share a common ancestry and possess uniform traits that distinguish them from other groups within the same species.

(B) According to the $NCERT$ textbook,India and China together possess more than $70 \%$ of the world's livestock population. However,their contribution to the world's farm produce is only $25 \%$. This indicates that the productivity per unit is very low in these countries.

(A) The per-unit production rate of livestock in countries like $India$ and $Africa$ is significantly lower compared to developed nations.
This is primarily due to factors such as poor management practices, lack of advanced breeding technologies, inadequate nutrition, and high disease prevalence in these regions.
Therefore, the correct option is $A$.

(D) Inbreeding refers to the mating of more closely related individuals within the same breed for $4-6$ generations.
This process increases homozygosity,which is essential for developing a pure line in any animal.
Inbreeding exposes harmful recessive genes that are then eliminated by selection.
It also helps in the accumulation of superior genes and the elimination of less desirable genes.

(A) Cross-breeding is a method of animal breeding where superior males of one breed are mated with superior females of another breed.
$1$. Hisardale is a new breed of sheep developed in Punjab by crossing Bikaneri ewes and Marino rams. This is an example of cross-breeding.
$2$. Mules and Ligers are examples of interspecific hybridization,where two different species are mated,not cross-breeding between different breeds of the same species.
Therefore,Hisardale is the correct example of cross-breeding.

(D) Inbreeding refers to the mating of more closely related individuals within the same breed for $4-6$ generations.
This process increases homozygosity,which is essential for developing a pure line in any animal.
It helps in the accumulation of superior genes and the elimination of less desirable genes by exposing harmful recessive alleles that are then selected against.

(B) According to the $NCERT$ textbook for Class $12$ Biology (Chapter: Strategies for Enhancement in Food Production),agriculture provides employment for approximately $62\%$ of the population in India. This sector is a major contributor to the country's economy and livelihood.

(C) $Murrah$ is a well-known high-yielding breed of domestic water buffalo $(Bubalus \, bubalis)$.
It is primarily found in the states of Haryana and Punjab in India.
This breed is highly valued for its high milk production and is considered one of the best dairy buffalo breeds in the world.

(A) The estrous cycle in cows and buffaloes is the period between two successive heats. The duration of the heat period (estrus) in cows and buffaloes is relatively short, typically lasting for about $24 - 36 \; \text{hours}$. During this time, the animal shows signs of receptivity to the male for mating.

(D) Inbreeding refers to the mating of more closely related individuals within the same breed for $4-6$ generations.
This process increases homozygosity,which is necessary if we want to evolve a pure line in any animal.
In contrast,outbreeding involves mating between unrelated animals,which may be between individuals of the same breed but having no common ancestors for $4-6$ generations (outcrossing),between different breeds (crossbreeding),or between different species (interspecific hybridization).

(D) dairy farm is a place where animals are kept for milk production. The animals commonly kept in a dairy include cows,buffaloes,sheep,and goats. Therefore,all of these animals are expected in a dairy.

(B) bull is an intact male bovine,while a bullock (or steer) is a castrated male bovine.
Testosterone is the primary male sex hormone responsible for aggressive behavior and physical strength in bulls.
Castration involves the removal of the testes,which are the primary source of testosterone production.
Due to the removal of the testes,the levels of blood testosterone in a bullock are significantly lower than in an intact bull.
This reduction in testosterone leads to a decrease in aggressive behavior,making the bullock more docile and easier to manage for agricultural work.

(D) Animal husbandry is the agricultural practice of breeding and raising livestock. It includes the management of animals like buffaloes,cows,pigs,horses,cattle,sheep,camels,and goats that are useful to humans for food and other products.
Poultry farming is the practice of raising domesticated fowls (birds) for eggs and meat.
Fisheries is an industry devoted to the catching,processing,or selling of fish,molluscs (shellfish),and crustaceans (prawns,crabs,etc.).
Since all three statements describe components of animal husbandry and related food production practices,all statements $I, II,$ and $III$ are correct.

(A) Exotic breeds of cattle (e.g.,Jersey,Brown Swiss) are imported from foreign countries. These breeds are primarily selected for their high milk-yielding capacity. However,they are not naturally adapted to the local tropical climate of countries like India and therefore require specific environmental conditions,better management,and protection from diseases to maintain their productivity.

(C) Animal breeding is the process of producing improved breeds of domesticated animals.
This is achieved by improving their genetic makeup (genotype) through the process of selective mating.
Therefore,$A$ refers to domesticated animals and $B$ refers to genotype.

(C) Animal husbandry is the agricultural practice of breeding and raising livestock. The practices concerned with the improvement in animal husbandry include:
$1$. Management of farm and farm animals: This involves providing proper shelter,feeding,and healthcare to the animals.
$2$. Animal breeding: This involves selective breeding to improve the genetic potential and productivity of the animals.
Therefore,both $(A)$ and $(B)$ are correct.

(D) Animal breeding is a branch of animal husbandry which deals with the genetic improvement of domesticated animals.
The main objectives of animal breeding are:
$1$. To increase the growth rate of animals $(I)$.
$2$. To increase the yield or production of products like milk,meat,eggs,and wool $(II)$.
$3$. To improve the quality of the products obtained,such as superior milk or meat quality $(III)$.
$4$. To develop resistance against various diseases to reduce mortality and loss $(IV)$.
Therefore,all the given statements are correct objectives of animal breeding.

(C) Animal husbandry is the agricultural practice of breeding and raising livestock.
It involves the scientific management of animals,which includes their feeding,breeding,and disease control to make them useful to humans.

(D) Livestock refers to domesticated animals raised in an agricultural setting to produce labor and commodities such as meat,eggs,milk,fur,leather,and wool.
Common examples of livestock include cattle,buffaloes,sheep,goats,pigs,and poultry.
Rhinoceros is a wild animal and is not domesticated or raised for agricultural purposes; therefore,it is not included in livestock.

(B) According to the $NCERT$ textbook for Class $12$ Biology,in the chapter 'Strategies for Enhancement in Food Production',it is stated that India and China together possess more than $70\;\%$ of the world's livestock population. However,their contribution to the world farm produce is only $25\;\%$. Therefore,the correct option is $B$.

(C) Dairy farm management involves the systematic care and breeding of animals to produce milk and milk products for human consumption. The primary objectives include:
- Improvement in the quality of milk.
- Selection of good breeds that possess high milk-yielding potential.
- Proper maintenance of the quality and quantity of fodder. Fodder must contain all essential nutrients,vitamins,and minerals to ensure the health of the cattle,which ultimately improves the yield and quality of milk.
- Selecting breeds that are resistant to diseases is a key objective,whereas selecting breeds that are vulnerable to diseases is counterproductive and not an objective of dairy farm management.

(B) $Dairying$ is the management of animals for milk and its products for human consumption.
$Poultry$ refers to the class of domesticated fowl used for food and for their eggs.
$Apiculture$ is the maintenance of hives of honeybees for the production of honey.
$Fisheries$ is an industry devoted to the catching,processing,and selling of fish,shellfish,or other aquatic animals.

(D) To realize the full yield potential of cattle,several management practices are essential:
$1$. Proper housing: Cattle must be provided with well-ventilated and comfortable shelter.
$2$. Adequate supply of water and fodder: $A$ balanced diet and clean drinking water are crucial for health and productivity.
$3$. Stringent cleanliness and hygiene: Regular cleaning of cattle and their sheds is necessary to prevent diseases.
Therefore,all the mentioned measures are required.

(B) The quality and quantity of fodder provided to cattle significantly contribute to the milk yield.
Proper nutrition,including essential nutrients and minerals,is vital for maintaining high milk production.
Therefore,the statement that fodder does not contribute much to milk yield is incorrect.

(A) Animal Breeding is the process of controlled mating and selection of domesticated animals to improve their genetic potential and obtain superior genotypes.
Feeding refers to the act of providing food or nourishment to organisms.
Weeding is the process of removing unwanted plants from a field or garden.
Heeding means to pay attention to or consider something carefully.

(A) $Breed$ is a group of animals related by descent and similar in most characters like general appearance,features,size,configuration,etc.
$Variety$ refers to a group of plants or animals within a species that have distinct characteristics but are not separate species.
$Race$ is a term often used for populations within a species that show distinct phenotypic differences.
$Species$ is the largest group of organisms capable of interbreeding and producing fertile offspring.

(A) Exotic breeds are foreign breeds introduced to a region.
Jersey is a well-known exotic breed of cattle originating from the Channel Islands.
Leghorn is an exotic breed of fowl (chicken).
Hisardale is a new breed of sheep developed in Punjab by crossing Bikaneri ewes and Merino rams.
Therefore,Jersey is the correct answer.

(D) Inbreeding refers to the mating of more closely related individuals within the same breed for $4-6$ generations.
It increases homozygosity,which is essential for developing a pureline in any animal.
This process helps in the accumulation of superior genes and the elimination of less desirable genes,thereby improving the breed.

(C) Animal breeding aims to improve the productivity and quality of livestock. The primary objectives include increasing the yield of products like milk,eggs,meat,and wool,enhancing the desirable qualities of these products,and developing resistance to various diseases. $A$ slow growth rate is detrimental to productivity; therefore,animal breeding focuses on increasing the growth rate,not slowing it down.

(A) Inbreeding refers to the mating of more closely related individuals within the same breed for $4-6$ generations.
This process increases homozygosity,which is essential for evolving a pure line in any animal.
By mating superior males and superior females of the same breed,the accumulation of superior genes occurs,and undesirable genes are eliminated.

(C) Inbreeding depression occurs due to the accumulation of harmful recessive genes through continuous inbreeding.
To overcome this,outcrossing is performed.
Outcrossing involves mating selected animals with unrelated superior animals of the same breed.
This practice helps in eliminating the accumulation of harmful recessive alleles and restores the vigor and fertility of the population.

(B) $a.$ Kashmiri goats produce Pashmina, which is a very fine and soft wool used for making shawls.
$b.$ Tibetan antelope (Chiru) is the source of Shahtoosh, often referred to as the 'King of wool'.
$c.$ Rabbit breeds like the Angora rabbit are known for producing Angora wool.
$d.$ Sheep breed 'Nali' is specifically known for producing superior quality carpet wool.
Therefore, the correct matching is $a(ii), b(iii), c(iv), d(i)$.

(A) The assertion is correct because bulls that are not selected for breeding are castrated at a young age to make them docile and easier to manage,turning them into bullocks. The reason is also correct because,in the agricultural landscape of India,bullocks serve as the primary source of animal draft power for plowing fields,transporting goods,and other farm-related activities. Since the castration is performed specifically to make them suitable for these labor-intensive tasks,the reason correctly explains the assertion.

(A) Fish meal is a high-protein supplement used extensively in the diet of livestock,such as cattle,and poultry birds.
It is produced by processing the non-edible parts of fishes,including tails,fins,and bones,which are by-products of the fish processing industry.
Since these parts are rich in proteins and minerals,they are dried and ground to form fish meal.
Therefore,both the Assertion and the Reason are correct,and the Reason provides the correct explanation for why fish meal is a rich source of protein.

(D) The correct statements are:
$I -$ Milk production depends on the genetic potential (breed) of the animal.
$II -$ Proper housing,water,and hygiene are essential for high yield.
$V -$ Modern dairy management uses machines for milking and processing to ensure hygiene and reduce human contact.
$VI -$ Regular veterinary check-ups are essential to prevent diseases and ensure animal health.
Statement $III$ is incorrect because animals require a balanced diet,not just 'any' food.
Statement $IV$ is incorrect because the quality and quantity of fodder are crucial for milk production.
Statement $VII$ is incorrect in the context of 'dairy farming' management specifically,as it mentions eggs,which relates to poultry farming.
Therefore,the correct statements are $I, II, V,$ and $VI$.