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
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
$\frac{1}{4}$
- B
$\frac{1}{16}$
- C
$\frac{1}{2}$
- D
$\frac{1}{8}$
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