KVPY SA Exam 2014 Question Paper

Question : 77 of 80

Marks: +1, -0

A woman heterozygous for color blindness marries a color blind man. What would be the ratios of carrier daughters, color blind daughters, normal sons and color blind sons in the F1 generation?

1:2:2:1
2:1:1:2
1:1:1:1
1:1:2:2

Validate

Solution:

Color blindness is X-linked recessive disorder

Ratio :

	Genotype	F $_1$ ratio
Carrier daughter	$XX^C$	1
Color blind daughter	$X^CX^C$	1
Normal son	XY	1
Color blind son	$X^CY$	1

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