Q1. In cats short hair is dominant over long hair and the gene involved is autosomal. Another gene, B1 is sex-linked and produces yellow coat colour; its allele, B2 produces black coat colour, and combination B1, B2 produces a tortise-shell coat colour. If a long-haired black male is crossed with a tortoise-shell female heterozygous for hair length what kind of kittens would be produced in the F1? If the F1 cats are allowed to generously interbreed among themselves, what are chances of obtain long-haired yellow male?

Q2. Both the endocrine and nervous systems are major regulating systems of the body; though, nervous system has been compared to an airmail delivery system and endocrine system to the pony express. In brief explain the comparison?