Siblings

When the offspring gets a abnormal chromosome from its father It says siblings (sister or brother) may have a chance of getting it or not getting it, depending on why there is a deletion (sporadic mutation in one sperm, as oppose to translocation thru meiosis ...

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... is basically out of a desire to see that their genes will have a future. In mammals, parents and children share 50% of their genome, and so do siblings. In colonial insects, the entire colony is centered around the queen and her constant reproduction. Every offspring she hatches is a sibling ...

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... Behavioural traits are significantly heritable. "Behavioral genetics has repeatedly found that the “shared environment” — everything that siblings growing up in the same home have in common, including their parents, their neighborhood, their home, their peer group and their school — has ...

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... mosaicism involves one twin embryo partially absorbing the other - that might be this situation, where the different areas are really different siblings. Halves would be unusual, but we don't really know the variations in this process too well.

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... too much or too disadvantageous mutations die. Humans have mischarriages, lower organisms simply do not survive the competition with their "siblings" who do not have these kind of mutations. Instead, some of them may have beneficial mutations, and soon they and their offspring gain ...

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