How is an exonuclease functionally different from an endonuclease? Give an example of any two endonucleases other than Sal I.

Differentiate between multiple allelism and pleiotropy with the help of an example each.

How does a vaccine for a particular disease immunise the human body against that disease?

Explain why it is scientifically incorrect to blame the mother for bearing female child.

This is the pedigree of a family tracing the movement of the gene for haemophilia. Explain the pattern of inheritance of the disease in the family.