A cross between individual with unknown genotype for a particular trait with a recessive plant for that trait is called

$\mathrm{RR}$ red flowered & plant of Mirabilis is crossed with $\mathrm{rr}$ (white) flowered plant of Mirabilis. All the $\mathrm{Rr}$ offsprings are pink. This is an indication that the $\mathrm{R}$ gene is

Multiple alleles of a gene always occupy

Blood grouping in humans is controlled by

Which of the following is an example of pleiotropy?

A marriage between two carriers of sickle cell anaemic gene will result into

The phenotypic ratio of red $\left(\mathrm{AABB}\right)$ and white $\left(\mathrm{aabb}\right)$ kernel in ${\mathrm{F}}_2$ generation showing polygenic inheritance is

When red wheat kernel is crossed with white wheat kernel, the probability of getting red darkest plant is

The phenotypic ratio of polygenes representing skin colour in humans is