3. Colorblindness is inherited as a sex-linked recessive disease. An affected ma

Question

3. Colorblindness is inherited as a sex-linked recessive disease. An affected male marries a heterozygous female. Draw a Punnett square of the possible offspring. 4. Hairy ears is inherited as a Y-linked trait. A man with hairy ears marries a woman with normal ears. Draw a Punnett square of the possible offspring. 5. This disease is inherited as sex-linked dominant disease. An affected male marries a homozygous recessive female. Draw a Punnett square of the possible offspring. What is the likelihood that any child they have will be affected.

Explanation / Answer

1 ) Colourblindness:

XcX X XcY

Hairy Ears:

XX X XYH

Sex linked dominant :

XX X XaY

50% of the child or 100 % female will be affected as father give his X chromosome to his daughter.

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