In a cross between genotypes showing recessive epistasis,the $F_2$ phenotypic ratio will be .....

Which one of the following is not a parasitic adaptation?

Select the incorrect pair.

If a modified allele produces a non-functional enzyme or no enzyme,then the phenotype will not be affected in which of the following cases?

Select the correct option for the following statements:
$P - F_1$ generation shows traits of both parents.
$Q - F_1$ generation shows a new trait (intermediate).
$R - F_1$ generation shows only one of the two parental traits.
$\quad \quad P \quad Q \quad R$

Match the List-$I$ with List-$II$:

List-$I$	List-$II$
$A$. $\text{ABO}$ blood group	$i$. Same phenotypic and genotypic ratio
$B$. Human skin colour	$ii$. Pleiotropy
$C$. Phenylketonuria	$iii$. Multiple allele
$D$. Incomplete dominance	$iv$. Polygenic inheritance