Both husband and wife have normal vision,thou | vedclass

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

Question

(A) The correct answer is $A$ $(0\%)$.Given:$1$. Both husband and wife have normal vision.$2$. Both fathers were colour blind $(X^CY)$.$3$. Both mothe

Vedclass · Accepted Answer

$0$

Vedclass · Answer

(A) The correct answer is $A$ $(0\%)$.Given:$1$. Both husband and wife have normal vision.$2$. Both fathers were colour blind $(X^CY)$.$3$. Both mothers were normal and did not carry the gene for colour blindness $(XX)$.Analysis:- The wife's father was colour blind $(X^CY)$,so she must have inherited the $X^C$ chromosome from him. Since she has normal vision,she must be a carrier $(X^CX)$.- The husband's father was colour blind $(X^CY)$,but the husband inherited his $X$ chromosome from his mother (who was $XX$). Therefore,the husband is normal $(XY)$.Cross:Parents: $XY$ (Husband) $	imes$ $X^CX$ (Wife)Gametes: $X, Y$ and $X^C, X$Offspring:- $X^CX$ (Carrier Daughter)- $XX$ (Normal Daughter)- $X^CY$ (Colour blind Son)- $XY$ (Normal Son)Conclusion:From the cross,the daughters are either carrier $(X^CX)$ or normal $(XX)$. None of the daughters are colour blind. Therefore,the probability of their daughters becoming colour blind is $0\%$.

Both husband and wife have normal vision,though their fathers were colour blind and their mothers did not have any gene for colour blindness. The probability of their daughters becoming colour blind is (in $\%$)

Similar Questions

Which of the following is a sex-linked disease?

What is the probability of having a color-blind male child from two normal parents?

Which disease is caused by a gene defect located on chromosome $16$,leading to a deficiency that affects the transport of respiratory gases?

All sons of a couple are colourblind because

Vedclass Test Series

Exam Paper Generator

Online Exam Module