A: The possibility of a female becoming a hae | vedclass

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

Question

(A) Haemophilia is an $X$-linked recessive disorder.For a female to be haemophilic (genotype $X^hX^h$),she must inherit one recessive allele $(X^h)$ f

Vedclass · Accepted Answer

Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

Vedclass · Answer

(A) Haemophilia is an $X$-linked recessive disorder.For a female to be haemophilic (genotype $X^hX^h$),she must inherit one recessive allele $(X^h)$ from her mother and one recessive allele $(X^h)$ from her father.This means the father must be haemophilic $(X^hY)$ and the mother must be either a carrier $(X^HX^h)$ or haemophilic $(X^hX^h)$.Since the condition is rare,the probability of both parents carrying the gene is very low,making the occurrence of a haemophilic female extremely rare.Thus,both the Assertion and the Reason are correct,and the Reason explains why the condition is rare in females.

$A$: The possibility of a female becoming a haemophilic is extremely rare.
$R$: Mother of such a female has to be a carrier and the father should be haemophilic.

Similar Questions

Which of the following pairs is incorrect?

The genes $HBA1$ and $HBA2$ associated with alpha-thalassemia are located on which chromosome in humans?

How many types of genotypes are observed in sickle cell anemia?

The gene for colour blindness is carried by:

What are the chances of colour-blind daughters and sons being born in a marriage between a normal man and a normal woman whose father was colour-blind?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$A$: The possibility of a female becoming a haemophilic is extremely rare.$R$: Mother of such a female has to be a carrier and the father should be haemophilic.