Question

oup Questions: .Sexual dimorphism is usually seen in polygynous species. What does polygyny mean? mole one Paltner What might we suspect if see sexual dimorphism in monogamous species? How might we test our ideas? What are the direct benefit, indirect benefit, and senso models of female choice? How do polyandrous species turn sexual selection on its head? mone made h the nest one 8

Answer 1

A.Sexual dimorphism is the systematic difference in form between individuals of different sex in the same species.Polygyny is a mating system in which one male species lives and mates with multiple female species but each female only mates with a single male species.

B.In monogamous mating the females and males have equal access to their mates.So there is little or no sexual dimorphism. Monogamous species have same play behaviour like polygamous but it is not really proven that the play behaviour is connected to the sexual dimorphism.

C.Direct benefits increase the fitness of the choosy sex through the direct materialistic advantages or resources.Whereas indirect benefits increase genetic fitness for the next generations and therby increase the parents' inclusive fitness.

Sensory bias model states that the preference for a trait evolves in a non-mating context and eventually exploited by one sex to acess the more mating opportunities.

D. Polyandrous introduces an additional postcopulatory source of variation in male reproductive strength also variation in the proporation of a set of eggs fertilized by different male species.The amount of variation in male reproductive success happend due to the weaken sexual selection by reducing the mating skew among males.