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

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

List-$I$	List-$II$
$(a)$ Gain or loss of nitrogen base	$(i)$ Aneuploidy
$(b)$ Gain or loss of segment of $DNA$	$(ii)$ Frame shift
$(c)$ Gain or loss of whole set of chromosome	$(iii)$ Euploidy
$(d)$ Gain or loss of one chromosome	$(iv)$ Chromosomal aberration

Interspecific crosses are rare in nature and intergeneric crosses are almost unknown. Why?

In a plant,three dominant genes $A$,$B$,and $C$ must be expressed together to produce purple flowers. If any one or all three genes are in the recessive state,the flowers become colorless.
Raw material $\xrightarrow{A} X \xrightarrow{B} Y \xrightarrow{C} Z$ (Pigment)
$A$ purple-flowered plant with genotype $AABBCC$ is crossed with a colorless plant with genotype $aabbcc$. This results in $F_1$ hybrid purple offspring. What will be the proportion of purple-flowered plants in the $F_2$ generation produced by selfing the $F_1$ generation?

Dominant epistasis is shown by

Based on the statements, choose the correct option given below.
Statement-$I$: Allelic genes lead to individual differences within the species.
Statement-$II$: About $1000$ varieties of mangoes are found in India.