$\quad \mathrm{P}-\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{A}}, \quad \mathrm{Q}-\mathrm{AB}, \quad \mathrm{R}-$ antibody a

$\quad \mathrm{P}-\mathrm{I}^{\mathrm{A}} \mathrm{I}^{\mathrm{B}}, \quad \mathrm{Q}-\mathrm{NIL}, \quad \mathrm{R}-$ antibody b

$\mathrm{P}-\mathrm{I}^{\mathrm{B}} \mathrm{I}^{\mathrm{B}}, \quad \mathrm{Q}-\mathrm{B}, \quad \mathrm{R}-\mathrm{NIL}$

$\quad \mathrm{P}-\mathrm{I}^{\mathrm{O}} \mathrm{I}^{\mathrm{A}}, \quad \mathrm{Q}-\mathrm{A}, \quad \mathrm{R}-$ antibody ab

All

Half

$3 / 4^{\text {th }}$

$1 / 4^{\text {th }}$

cloning

mutation

heredity

variation

it is a polygenic inheritance

alleles of two genes are linked to each other

alleles of two genes are segregated independently

it is a case of multiple alleles