The science which links heredity with environments is known as:

In a 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?

$A$ gene which suppresses the activity of another gene but does not lie on the same locus is called:

Differentiate between a monohybrid cross and a dihybrid cross.

Which of the following is a sex-influenced character?

$A$ person may have one gene for normal haemoglobin and one gene for sickle cell haemoglobin. This heterozygous condition is called: