Q6.3. What effect does inbreeding have on a population? Inbreeding tends to decrease the effects of sampling error in a population. Inbreeding tends to increase the census population size. Inbreeding tends to increase the proportion of homozygous individuals in a population. Inbreeding tends to decrease a population's susceptibility to disease.
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Sampling error refers to the discrepancy between a sample's characteristics and the true characteristics of the population from which it was drawn. Inbreeding, which is the mating of closely related individuals, can actually increase sampling error because it Show more…
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Inbreeding can have harmful effects in populations because mating between related individuals results more frequently in homozygotes with two alleles that are identical by state. This results more frequently in homozygotes with two alleles that are identical by descent, which increases the chance that deleterious and lethal recessive alleles will combine to produce homozygotes with harmful traits. Inbreeding also causes a reduction in heterozygosity in the population and results in more frequent cases of inbreeding depression in individuals in the population.
Adi S.
What effect does inbreeding have on allele frequency? Why is marriage between close relatives discouraged?
As we have seen, inbreeding can reduce offspring firmness by exposing deleterious recessive alleles. However, some animal breeders practice penetrations of careful inbreeding within a family, or "line breeding:" and surprisingly many of the line-bred animals, from champion dogs to prize cows, have normal health and fertility, How can it be possible to continue inbreeding for many generations without experiencing inbreeding depression due to recessive alleles? (Hint. Consider some of the differences between animal breeders and natural selection in the wild.) Generally, if a small population continues to inbreed for many generations, what will happen to the frequency of the deleterious recessive alleles over time?
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