Match the following and choose the correct option:

Column-$I$	Column-$II$
$(p)$ Mendel	$(i)$ Chromosomal theory of Inheritance
$(q)$ Morgan	$(ii)$ Recombination map
$(r)$ Alfred Sturtevant	$(iii)$ Linkage
$(s)$ Sutton	$(iv)$ Law of Segregation

In bread wheat,the chromosome number is:

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?

Which of the following is an example of codominance?

Which of the following statements are correct?
$(a)$ The $X$-linked genes are located on the non-homologous region of $X$-chromosomes.
$(b)$ Females with the recessive gene on one $X$-chromosome are carriers.
$(c)$ The carrier female is also severely affected by the disorder.
$(d)$ $Y$-linked genes are located on the homologous region of $Y$-chromosome.
$(e)$ Human males have homomorphic sex chromosomes.
Choose the correct option.

The $F_2$ dihybrid ratio $9 : 3 : 4$ is explained on the basis of