In order to determine whether variations of a character in a population were genetically controlled, the most appropriate procedure will be to
In order to determine whether variations of a character in a population were genetically controlled, the most appropriate procedure will be to
- [AIIMS 1983]
- A
Count chromosomes and find out the variations in number in the population
- B
Examine $DNA$ and see if the population shows any variation
- C
Measure the variations and see if they are continuous or discontinuous
- D
Cross individuals of both extremes and see if the offsprings and parents show the same range of variations
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$A$ $Y-$linked gene is responsible for hypertrichosis (long hair on ears). When an affected man marries a normal woman, what percentage of their daughters would be expected to have hairy ears?
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In pea plants, red flowers $(R)$ are dominant over to white flowers $(r)$ and tall plants $(T)$ are dominant over to dwarf plants $(t)$. The table below shows the gametes and the possible offsprings produced in a dihybrid cross. The numbers $1$ to $16$ represent the genotypes of each individual cross $(e.g. 3 = RrTT)$
$RT$ $Rt$ $rT$ $rt$
$RT$ $1$ $2$ $3$ $4$
$Rt$ $5$ $6$ $7$ $8$
$rT$ $9$ $10$ $11$ $12$
$rt$ $13$ $14$ $15$ $16$
If plant $7$ is crossed with plant $12$, then what proportion of the offsprings produced will be homozygous for both the recessive characters
In pea plants, red flowers $(R)$ are dominant over to white flowers $(r)$ and tall plants $(T)$ are dominant over to dwarf plants $(t)$. The table below shows the gametes and the possible offsprings produced in a dihybrid cross. The numbers $1$ to $16$ represent the genotypes of each individual cross $(e.g. 3 = RrTT)$
$RT$ $Rt$ $rT$ $rt$
$RT$ $1$ $2$ $3$ $4$
$Rt$ $5$ $6$ $7$ $8$
$rT$ $9$ $10$ $11$ $12$
$rt$ $13$ $14$ $15$ $16$
If plant $7$ is crossed with plant $12$, then what proportion of the offsprings produced will be homozygous for both the recessive characters