$A$: Antlers in male deer are sex-influenced traits.
$R$: These are controlled by autosomal genes which are influenced by the sex of the bearer.

Match the following columns.

Column-$I$	Column-$II$
$(w)$ Blood group	$(a)$ Polygenic inheritance
$(x)$ Skin colour	$(b)$ Aneuploidy
$(y)$ Mendelian disorder	$(c)$ Incomplete dominance
$(z)$ Chromosomal disorder	$(d)$ Sickle-cell anaemia
	$(e)$ Co-dominance

Which of the following statements is correct?

Read the following statements carefully:
$(1)$ Ploidy is a structural chromosomal abnormality.
$(2)$ Hemophilia is an autosomal recessive disorder in which blood does not clot.
$(3)$ Recombination is one of the factors responsible for evolution.
$(4)$ Genetic mapping allows the determination of the specific location of a gene on a chromosome.
$(5)$ Snapdragon plant is an example of incomplete dominance.
$(6)$ $ABO$ blood grouping shows both dominance and codominance.
Identify the correct and incorrect statements from the given options.

$A$ human male is heterozygous for autosomal genes $A, B$, and $G$, and also for the hemophilic gene $h$. What is the probability of his sperm being $abgh$?

$A$ : Test cross is the tool for knowing linkage between genes.
$R$ : Monohybrid test cross gives two phenotypes and two genotypes.