Question

Study the given pedigree chart showing the inheritance of an $X$-linked trait controlled by gene '$r$'.

What will be the genotypes of individuals $A$, $B$, $C$ and $D$ respectively ?

• A. $XX$, $X^{r}Y$, $X^{r}X$, $XY$
• B. $X^r{X}^r$, $XY$, $XX$, $XY$
• C. $X^{r}X$, $X^r{Y}^r$, $X^r{X}^r$, $X^{r}Y$
• D. $XX$, $X^r{Y}^r$, $XX$, $XY$

Answer 1

Answer: (A)

Genotypes of different individuals in the given pedigree chart can be illustrated as :