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

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

In humans, polydactyly (i.e, presence of extra fingers and toes) is determined by a dominant autosomal allele $\left(\mathrm{P}\right)$ and the normal condition is determined by a recessive allele $\left(\mathrm{p}\right)$ . Find out the possible genotypes of family members $1, 2$ and $3$ in the given pedigree.