Question

A woman whose father was colourblind marries a

man with no history of colourblindness then what

percentage of their offspring will be colourblind?

(1) 25% (2) 50%

(3) 75% (4) 0%​

Answer 1

Answer:

1

Explanation:

woman - XcX × man XY

progenies-

XcX ,

XcY,

XX ,

XY

so diseased are 25%

and carrier are 25%

Xc is the gene(allele) for colour blindness

Answer 2

Answer:

50%

Explanation:

the woman has a diseased x chromosome.As the man is healthy the chance of kids getting infected is only from mother.Now the diseased x chromosome from mother can be transferred to 2 out of 4 children,1 boy and 1 girl. so chance is 50%