Sex chromosomes of a female bird are represented by

What will be possible blood group in children from the parents with $B$ and $AB$ blood groups?

Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be an albino

In which of the sex determination both male and female have same number of chromosomes?

To be evolutionary successful, a mutation must be

Crossing over is advantageous because it brings about