In Huntington’s disease, the unaffected persons are homozygous for normal allele $h$. The following is erroneous because
In Huntington’s disease, the unaffected persons are homozygous for normal allele $h$. The following is erroneous because
- [AIIMS 2015]
- A
it shows both male and female affected by Huntingtons disease
- B
either person $6$ or $7$ should have the disease, if individual $11$ shows the disease.
- C
at least one of the $2$ children $(8,\,9)$ should have the disease
- D
all of these
Similar Questions
A man with normal vision whose father was colourblind marries with women whose father was also colourblind. Suppose their first child is daughter then what are the chances of this child to be colourblind?
A man with normal vision whose father was colourblind marries with women whose father was also colourblind. Suppose their first child is daughter then what are the chances of this child to be colourblind?
Study the given pedigree chart and select the correct option of the given question.
$(1)$ Is the trait recessive of dominant ?
$(2)$ is the trait sex linked or autosomal ?
Study the given pedigree chart and select the correct option of the given question.
$(1)$ Is the trait recessive of dominant ?
$(2)$ is the trait sex linked or autosomal ?
Assertion : Haemophilia is a recessive sex linked disease.
Reason : Haemophilia occurs due to mutation of a structural gene on chromosome $15$.
Assertion : Haemophilia is a recessive sex linked disease.
Reason : Haemophilia occurs due to mutation of a structural gene on chromosome $15$.
- [AIIMS 2007]
:Match the columns :
Column $I$
Column $II$
$(a)$
Sickle cell anaemia
$(p)$
Homogentisic acid
$(b)$
Alkaptonuria
$(q)$
Lack of Melanin
$(c)$
Albinism
$(r)$
Accumulation of Amino acid
$d)$
Phenyl Ketonuria
$(s)$
Defective haemoglobin
:Match the columns :
| Column $I$ |
Column $II$ |
||
| $(a)$ | Sickle cell anaemia | $(p)$ | Homogentisic acid |
| $(b)$ | Alkaptonuria | $(q)$ | Lack of Melanin |
| $(c)$ | Albinism | $(r)$ | Accumulation of Amino acid |
| $d)$ | Phenyl Ketonuria | $(s)$ | Defective haemoglobin |
What is the cause of haemophilia
What is the cause of haemophilia