Question

Inbreeding depression is overcome by employing -

• A. Inter specific hybridisation
• B. Infra specific hybridisation
• C. Out-crossing
• D. Cross-breeding

Answer 1

The correct option is C Out-crossing

Interbreeding depression is a loss of vigour caused by persistent interbreeding for many generations. It is useful to obtain desirable homozygous traits. To overcome interbreeding depression, the individual is crossed with a related individual with no recent common ancestor.
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Out-breeding : Breeding unrelated animals of the same species or different species. It is of three types:

• <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Out-cross: Animals that belong to the same breed but have no common ancestors from 4-6 generations ago.
• <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Cross-breeding is done when superior males of one breed are mated with superior females of another breed.
• <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Interspecific breeding is done when the male and female animals of two different related species are mated.

So, by the application of outcross, inbreeding depression can be overcome.