Interestingly, some species (naked mole rats for one,) are fairly immune to the problem.
this post was submitted on 05 Feb 2024
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Every person gets their genes from their mom and dad, however certain traits (defects, if you will), are present in everyone. Thats why we have mental illness and birth defects. However, you isolate a gene pool, and those bad traits get more and more focused. For example, their is a family known as the Blue Fugates who have been doing incest since the 19th century, and now the family has a blood defects that makes their skin blue.
Not enough genetic diversity.
Over time this causes mutations. Mutations aren’t always bad but when they are it’s really bad and causes noticeable defects.
You're on the right track, and others have explained it. Mutations happen regardless. The important thing is that because of redundancy between two copies, the effects of many mutations can be masked. The mutated alleles circulate throughout the population and only face selection when combined with another loss-of-function allele in the same functional unit (gene).
Those recessive mutations are more likely to be matched with an identical partner allele if you reproduce with close relatives. Even if you don't do that, the odds are higher if you're in a closed community.
Lanisters up to it again..
Hello Alabama!