Question

The two types of outbreeding are ______ and _____ that cause variation among species.
A. Outbreeding and cross breeding
B. Inbreeding and hybridization
C. Selection and outcrossing
D. None of the above

Answer 1

Breeding of unrelated animals that may be of the same type but do not have a common ancestor or other races or species for four to six generations. Inbreeding is the mating of closely related individuals within the same breed for four to six generations.

Complete answer:
Hybridization - Crossover between genetically different genotypes is called hybridization.
Inbreeding -The process of crossing individuals more closely related to the middle part of the population from which they come is called inbreeding. For example, virgin reproduction of animals and apomixis and self-fertilization of plants are the most extreme types of inbreeding.
Outbreeding - It is the breeding of unrelated animals, which may be individuals of the same breed but having no common ancestors for four to six generations or different breeds or different species.
There are mainly three types of outbreeding:
1.Outcrossing -This is a practice of mating of animals within the same breed, but having no common ancestors on either side of their pedigree for four to six generations
The offspring of such a mating is called outcross .
2.Crossbreeding - It is the mating of two animals of different breeds but belongs to the same species. Crossbreeding allows the desirable qualities of two breeds to be combined.
Examples-Hissardale ,Karan Swiss, Sunandini, Karan Fries, Frieswal.
3.Interspecific hybridization - In this method, Male and female animals of two different related species are mated .
Examples-Mule which is developed by mating Male donkey and female horse.
So animal breeding is of two types inbreeding and outbreeding. Outbreeding is of further three types outcrossing, crossbreeding and interspecific hybridization.

Hence from the above points, the correct option is (A).

Note: Outbreeding increases heterozygosity and increases offspring energy. Thus, both congenital parents, who were homozygous for different genes when crossed, produced heterozygous F1 offspring for all genes. These F1 varieties or hybrids can improve overall endurance, disease resistance, and significantly improve growth and strength. The superiority of hybrids over their parents is best known as heterosis, a term coined by Schull to describe the characteristics of a hybrid.
A single outcross helps in overcoming the inbreeding depression.