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If a colourblind woman marries a normal visioned man, their sons will be :

  1. A
    all normal visioned
  2. B
    one-half colourblind and one-half normal
  3. C
    three-fourths colourbling and one-fourth normal
  4. D
    all colourblind

Solution & Step-by-step Explanation

A colourblind woman has genotype . Since sons inherit their single X chromosome exclusively from their mother, all sons will receive the allele and be colourblind.

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If a colourblind woman marries a normal visioned man, their sons will be :
A
all normal visioned
B
one-half colourblind and one-half normal
C
three-fourths colourbling and one-fourth normal
D
all colourblind

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Principles of Inheritance and Variation

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