Question

Mr. Stevan is suffering from haemophilia and cystic
fibrosis. His father is hetrozygous for cystic fibrosis.
The probability of Stevan's sperm having recessive
X-linked as well as autosomal allele is
a) 1/4
b) 1/16
c) 1/2
d) 1/8
​

Answer 1

There are 50% chances so c is correct option

Answer 2

Answer:

Explanation: autosomal recessive therefore aa genotype for cystic fibrosis which will be 100 % and male has only one X chromosome hence probability 50% for haemophilia . Therefore gametic combination = 1 * 1/2 = 1/2

Regards

Dr.