Give at least three evidences in support of X-chromosome inactivation and dosage compensation.

Mention few evidences in support of chromosome theory of inheritance.

Give at least five evidences in favour of biological evolution.

Give at least two evidences that support the recapitulation theory.

Give evidences in favour of chromosomal theory of inheritance. What is crossing over?

Give evidences in favour of chromosomal theory of inheritance. What is DNA packaging?

Give at least three reasons behind Mendel's success in formulating Law of inheritance.

Give at least three application of biotechnology in the field of medicine along with its uses.

A cross of white eyed female and red eyed male drosophila gives red eyed females and white eyed males. Rarely this cross may give all white eyed females and red eyed males. This was found to be due to 1. loss of a sex chromosome 2. non disjunction of X chromosomes in female 3. mutation in female fly 4. mutation in male fly

'Many of uncontrolled actions of human beings to pollute environment'-Give three examples to support this statement. Give example of a national park and biosphere reserve in West Bengal.