wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Haemophilic man marries a normal woman. Their offspring will be

A
all haemophilic
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
all boys haemophilic
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
all girls haemophilic
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
all girls are carriers
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D all girls are carriers
The genotype representation of a haemophilic male is XhY and the normal female would have a genotype of XX. Females have two X chromosomes. When the allele is present on one of the X chromosome, the female is said to possess the trait but doesn’t show phenotype expression. Such females are known as carriers and lead a normal life. Their genotype is represented by (XhX or XXh). But when both the X chromosomes have a mutated allele, the female is said to be haemophilic. Their genotype is represented by XhXh.
The following cross depicts the offsprings of a haemophilic man married to a normal woman.
Both the female children are carriers, so they will not be diseased, though they possesses the allele. The male children are normal.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon