NEST2019BiologyPrinciples of Inheritance and Variation
A sex-linked recessive gene in humans produces color-blind men when hemizygous ( X ^ c b Y ) , and color-blind women when homozygous ( X ^ c b X ^ c b ) . A non-linked, autosomal, but sex-influenced gene for pattern baldness is dominant in men ( BB or Bb ) and is only manifested in women when they are homozygous dominant ( BB ). A heterozygous bald, color-blind man marries a non-bald woman with normal vision whose fa
Options
- ANon-bald, normal vision daughters are 3:8; Non-bald, normal vision sons are 1:8
- BNon-bald, color-blind daughters are 3:8; Non-bald, color-blind sons are 1:8
- CBald, normal vision daughters are 1:8; Bald, normal vision sons are 3:8
- DBald, color-blind daughters are 1: 8 ; Bald, color-blind sons are 3: 8
Correct answer
D. Bald, color-blind daughters are 1: 8 ; Bald, color-blind sons are 3: 8
Step-by-step solution
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