All sons of a couple are colourblind because

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Colour blindness is an $X$-linked recessive disorder.For a son to be colourblind,he must inherit the $X$ chromosome carrying the recessive allele

Vedclass · Accepted Answer

Mother is homozygous colourblind

Vedclass · Answer

(A) Colour blindness is an $X$-linked recessive disorder.For a son to be colourblind,he must inherit the $X$ chromosome carrying the recessive allele from his mother.If the mother is homozygous colourblind $(X^cX^c)$,she will pass the $X^c$ chromosome to all her sons.Since sons receive their only $X$ chromosome from their mother and the $Y$ chromosome from their father,all sons will be colourblind $(X^cY)$ regardless of the father's genotype.

Similar Questions

Sickle cell anemia cannot be eliminated from the African population because ........... .

The disease 'Haemophilia' is caused due to the lack of:

Which of the following disorders is more commonly observed in males than in females?

Marriages between close relatives should be avoided because they have a higher incidence of:

Haemophilia,a $X$-linked recessive disease,is caused due to the deficiency of:

Vedclass Test Series

Exam Paper Generator

Online Exam Module