Ecology of Mating Systems 2 male forms in every society (Both have advantages and disadvantages) 1. Large and dominant 2. Small and retiring What are the benefits of sexual reproduction and asexual reproduction? Diseases may be the reason for sexual reproduction. Example: The black plague. There are some people who are resistant to the plague and can produce children who are also resistant to the plague. This is how he plague died out. Polygynous: when one male mates with many females.Monogamous: One male and One Female. 90% of birds are monogamous. Why? Because their baby birds are helpless and need both a mother and a father to care for them. Altricial: helpless young Precocial: A baby that needs only one parent to survive. Polyandrous: Female mates with many males. Parental Investment: much time invested in a small amount of offspring Mammals have a different amount of investment between sexes. Reproductive mistake: more common for females to make so males must prove they are the best for sexual reproduction. Example? ? they provide signs of genetic superiority.. Predictions: Polyandry will always be rare. Ostriches are the exception. Monogamy will always be common among birds but rare among mammals Polygyny will always be common among mammals but rare among birds.
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