If the genotype of an individual consists of only one type of alleles at the same locus,it is called:

Allelic genes are located on:

The $1/4 : 1/2 : 1/4$ ratio of $TT : Tt : tt$ can be depicted mathematically by the binomial expression (ideally):

$A$: Mendel proposed postulates like "principles of segregation and principles of independent assortment" after studying seven pairs of contrasting traits in garden pea.
$R$: He was lucky in selecting seven characters in pea that were located on seven different chromosomes.

Out of the $7$ pairs of contrasting traits selected by Mendel,how many traits were related to the pea pod?

Which of the following is incorrect regarding Mendelian characters in $Pisum$ $sativum$?