
Study the diagram above and answer the following questions:
(a) How many alleles are involved in blood grouping?
(b) A person having 'AB' blood group has both dominant alleles. What is this inheritance type called?
(c) A man with 'A' blood group marries a woman with 'B' blood group. Can they have a child with 'O' blood group? Explain with the help of a cross.
Explain the events which occur within a female Anopheles mosquito after it has sucked blood from a malaria patient.
Analyse the characters of William Douglas from ‘Deep Water’ and Mukesh from ‘Lost Spring’ in terms of their determination and will power in pursuing their goals.