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topogigio topogigio
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11 years ago
From what I understand inbreeding in a population causes genetic abnormalities that make it hard for the resultant offspring to be weak or unable to live. But what exactly about males and females with similar genomes reproducing causes these abnormalities to occur?
A lot of great answers here, and I appreciate the linked article. I can't decided which answer is best, most people gave essentially the same answer, so I'm going to let this one go to vote. Thanks again!
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wrote...
#1
11 years ago
Reinforcement of negative traits.
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#2
11 years ago
Lack of genetic diversity means that abnormalities stand a better chance of expressing.
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#3
Bronze Member
11 years ago
Certain abnormalities are recessive traits. However, if the same recessive trait is found in both parents, the offspring are much more likely to have the abnormality.
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#4
11 years ago
Because if a brother and sister carry the same abnormal gene then if they did breed (gross) the child is more likely to inherit that gene and come out messed up. Read this article its very interesting on inbreeding.
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#5
11 years ago
Many genes that cause problems are recessive meaning it takes the same gene fron each parent to produce the problem.  If 1 parent provides a dominant gene and the other has a recessive,  then the problem won't manifest itself. With inbreeding, you have the gene present in a greater percentage of potential parents   so the likelihood is greater that both parents will have a recessive gene than in a "normal" population pool.Thus the likelihood of producing offspring with the problem
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#6
11 years ago
That's just natures way of saying "eeewwww! You nasty!"
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#7
11 years ago
We know HOW inbreeding produces abnormal offspring: It allows unhealthy recessive alleles to be phenotypically expressed.

WHY is a different question. But keep in mind that the recessive alleles are ALREADY present in the population, and that inbreeding does not CAUSE them.
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#8
11 years ago
Just about everyone has some kind of genetic mutation most of the time there is no noticeable effect. However, when a child gets the same defect from both parents the defect will tend to be much more pronounced. Recessive genetic disorders are much more likely to be reinforced when the family tree doesn't branch.
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#9
11 years ago
There are geneotypes, traits in the genes, and phenotypes when those traits are visible. Inbreeding causes genetyoes held by small populations to be expressed as phenotypes, just as tall people tend to have tall children, and red haired people tend to have redhaired children.
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