What map unit (Centimorgan) is adopted in the construction of genetic maps?

1.	A unit of distance between genes on chromosomes, representing 50% cross-over.
2.	A unit of distance between two expressed genes, representing 10% cross-over.
3.	A unit of distance between two expressed genes, representing 100% cross-over.
4.	A unit of distance between genes on chromosomes. representing 1% cross-over.

Sickle cell anaemia has not been eliminated from the African population because:

1. It is controlled by recessive genes

2. It is not a fatal disease

3. It provides immunity against malaria

4. It is controlled by dominant genes

The inheritance of flower colour in dog flower and 4’O clock plant exhibits:

Occasionally, a single gene product may produce more than one effect. Such a gene is said to be:

The mechanism of sex determination in grasshoppers is:

A plant, on repeated self-pollination, preserves the trait expressed for many generations. Such a plant is said to be:

What is the F₂ phenotypic ratio in cases of incomplete dominance?

The famous double helix model of DNA was proposed by Watson and Crick in ____ and they shared Nobel Prize for Physiology or Medicine in ________ for their effort.

Which of the following is a recessive trait for a character chosen by Mendel in garden pea?

To study whether a gene exhibits multiple allelism or not, one must study: