Question

In the above given pedigree, assume that no outsider marrying in, carry a disease. Write the genotypes of II and III.

• A.
  All $X^{d}Y$
• B. $X^{D}Yand{X}^D{X}^d$
• C.
  $X^{d}X{X}^{d}Yand{X}^{d}Y$
• D.
  $X^d{X}^{d}and{X}^{d}Y$

Answer 1

The correct option is C

$X^{d}X{X}^{d}Yand{X}^{d}Y$
The given pedigree shows: X — linked recessive disease.
Here, the genotypes are as follows:

$V—X^d{X}^{d}I—X^{d}YIV—X^D{X}^d/X^D{X}^{D}II—X^{d}YIII—X^D{X}^d/X^D{X}^D$