Reproductive Health — BIOLOGY STD 12 Science — Question

Do you think Mendel's laws of inheritance would have been different, if the characters he chose were located on the same chromosome? Why?

According to Hardy – Weinberg’s principle the allele frequency of a population remains constant. How do you interpret the change of frequency of alleles in a population?

State the function of mast cells in allergy response.

How many pollen grains and ovules are likely to be formed in the anther and the ovary of an angiosperm bearing 25 microspore mother cells and 25 megaspore mother cells respectively?

Why is X-chromosome called sex chromosome?

Why is RNA more reactive in comparison to DNA?

What is meant by 'competitive release'?

Write the names of two vertebrate body parts which are homologous to the fore- legs of humans?

List various natural methods of birth control.

How many types of mRNA exist on the basis of number of cistron?