question_answer

A marriage between normal visioned man and colour blind woman will produce, which of the following type of offsprings ?

A)  Normal sons and carrier daughters

B)  Colourblind sons and carrier daughters

C)  Colourblind sons and  S0% carrier daughters

D)  50% colourblind sons and 50% carrier daughters

Correct Answer: B

Solution :

                Colour blindness is a recessive sex-linked defect in which human beings are unable to distinguish red and green colours. Gene complement of a colour blind woman is \[{{X}^{c}}{{X}^{c}}\]that of colour blind man \[{{X}^{c}}y\] and carrier woman with normal vision \[X{{X}^{c}}\]. A marriage between normal visioned man and colour blind woman will produce colour blind sons and carrier daughters,