Williams combined the general concepts of ______ with Medawar's ______ to suggest a mechanism by which senescence can arise in a population in which genes are selected for reproductive success.

Question

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Williams combined the concept of pleiotropy (the multiple effects of one gene on an individual's fitness) with Medawar's idea of declining force of natural selection (the decreased effectiveness of selection in eliminating deleterious alleles later in life) to suggest that senescence (biological aging) can arise in a population in which genes are selected for reproductive success. This combination of ideas suggests that genes that are beneficial for reproductive success early in life may have negative effects later in life, leading to senescence.

Williams Combined the General Concepts of ______ with Medawar's ______

Williams Combined the General Concepts of with Medawar's