In humans,the presence of a beard and mustache in males is an example of a:

Interspecific crosses are rare in nature and intergeneric crosses are almost unknown. Why?

On the basis of Mendel's work,which of the following laws were formulated?
$I.$ Linkage
$II.$ Segregation
$III.$ Incomplete dominance
$IV.$ Independent assortment
Choose the correct option.

In certain plant species,red flower colour is incompletely dominant to white flower colour (the heterozygote is pink) and tall stems are completely dominant to dwarf stems. If a tall pink plant $(TtRr)$ is crossed with a tall white plant $(TTrr),$ which one of the following types of plants would be produced in the offspring?

Select the incorrect statement from the following.

$A$ back-cross is a cross between ........