Biology 1001A Lecture Notes - Lecture 17: Evolutionary Arms Race, Inclusive Fitness, Parental Investment
14 Nov 2016
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Document Summary
In monogamous relationships, offspring will have the same parents and will be more closely related, sharing most of their alleles. As a result of higher degree of relatedness, offspring would show more cooperation. In promiscuous mating systems, each offspring is likely to have one differing parent meaning that siblings are often only half-siblings, sharing only half of their alleles. In loci where only the maternal copy is expressed, the alleles are associated with slowing down embryonic growth. The interest of the mother and the father are different and the alleles they pass on to their offspring reflect this conflict. Offspring are all closely related to the mother. Maternal alleles direct the offspring to be less selfish and save resources for future offspring because from the maternal side, offspring are all related. Total rb = 4 offspring: mtdna (mitochondrial) inherited maternally. Nuclear genes inherited bi-parentally: nuclear dna is biparentally inherited but mtdna and cpdna is uniparentally inherited.
