The concepts of mate choice and competition over eligible members of the opposite sex in animals, including humans.

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Definition of Sexual Selection?

How do you define Sexual Selection (SS)? (One might want to subdivide SS into intra- and inter- SS to answer) Is SS clearly different from Natural Selection (NS)? Is SS nested within NS or are NS ...
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Are there any mammals in which polyspermy produces viable zygotes?

Are there any mammals in which polyspermy produces viable zygotes? In the wikipedia page it is mentioned that there is a delicate equilibrium between female defenses against many sperms, which ...
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What is a sex-biased gene?

How do you define a male-biased gene and a female-biased gene as they are found in the abstract of this article.