The genes controlling seven traits in pea studied by Mendel were later found to be located on following number of chromosomes:

$A$ human male is heterozygous for autosomal genes '$A$' and '$B$'. He is also hemizygous for the haemophilic gene '$h$'. What percentage of sperms will carry the '$abh$' genotype (in $\%$) (in $\%$)?

Provide definitions/explanations for the following terms:
$1.$ Genetics
$2.$ Heredity

Define the following terms: $Genes$ and $Alleles$.

Which of these is a dominant factor?

To determine the heterozygosity of an organism,one has to perform: