Question

What is inbreeding depression? How is it controlled?

Answer 1

Hint:Breeding is the sexual mating between the organisms. It is of two types as inbreeding and the out breeding. Inbreeding is the sexual mating between the animals of the same breed where the out breeding takes place between the other breeds.

Complete answer:
Inbreeding depression is brought about by consistent breeding among the cows of the same breed. This causes reduction in the biological fitness of an organism resulting in the loss of ability to survive and infertility. It reduces the fertility and, even, efficiency of an animal. It can be avoided by applying outbreeding techniques. By applying the out breeding, the fertility of the animals also increases and the animals provide high milk and good quality offspring. This outbreeding involves crossing the breeds that do not have the common ancestors. The outbreeding is classified into out-crossing, cross breeding and the interspecific hybridization.

(1) Outcrossing: It is the crossing between the animals that do not have the common ancestors.
(2) Cross breeding: It is the breeding between the different breeds of the organisms.
(3) Interspecific hybridization: This interspecific hybridization is the process of crossing the different species in the same breeds.

Note: In breeding in the animals for several generations causes the expression of the only recessive traits like weak animals, less milking varieties in the cattle, loss of fertility etc. This leads to less efficiency and the yield of the animals.