why Parent-Offspring conflict might vary within a single species?

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Hello,

Q. why Parent-Offspring conflict might vary within a single species?

Answer-

Parent-Offspring conflict occurs in sexually reproducing species and it is based on a genetic conflict.
Parents are equally related to each of their offspring and are therefore expected to equalize their investment among them.
Offspring are only half or less related to their siblings, so they try to get more the parents intended to provide even at their siblings' disadvantage.
However the Parent-Offspring conflict is limited by the close genetic relationship between parent and offspring.
If an offspring obtains additional PI at the expense of its siblings, it decreases the number of its surviving siblings.
Therefore, any gene in an offspring that leads to additional PI decreases the number of surviving copies of itself that may be located in siblings.
Thus, if the costs in siblings are too high such a gene might be selected against despite the benefit to the offspring.

Thanking You!

gladiator answered 1 year ago

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