The given figure shows:

Options

A. An X-LINKED recessive trait
B. An X-LINKED dominant trait
C. An autosomal recessive trait
D. An autosomal dominant trait

Answer

B

Explanation

The given figure shows An X linked dominant trait (Colour blindness) Colour blindness is known as an X-linked recessive trait caused due to the defective allele on the X chromosome. In the given case, since the father is colour blind, his genotype would be `X^(c )Y`. As the woman has colour blind father, she is carrier of the trait but her vision is normal Therefore, her genotype would be `X^(+)X^(c )`. This carrier woman marries with a normal visioned man, `X^(+)Y`.