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21 Cards in this Set
- Front
- Back
what is anisogamy |
where males and females have different gametes (eggs vs sperm) |
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what are sexual dimorphism related to |
optimal mating rates and amount of mate compeitition |
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what I sexual conflict |
when males and females have different mating strategies they often conflict |
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describe sexual antagonistic coevolution |
when to sexes evolve traits in response to the other sex |
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give an example of sexual antagonistic coevolution of Mae exploration behaviour and female resistance |
males exploite females by suggesting they have genes they dont actually have (increase male fitness) females evolve traits in response to male exploitation (increasingly female fitness decrease male) |
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describe the experiment on fruit flies for sexual antagonistic evolution in monogamy and polygamy groups |
males in monogamy groups harassed females less and females have higher fitness and less evolved resistance |
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why do males harass females |
because of differences in sexual investment males have higher optimal mating rates and have evolved traits to increase they making frequency |
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in a study with fruit flies so attractive (larger) females get more harm from males |
yes, they're harassed more |
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what is convenience polyandry in females |
when the cost of accepting another mate is lower than the cost of persistent harassment |
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describe the results testing female preference in fruit flies with high or high harm males |
females not previously exposed to high harm males will spend more time around high harm males females previously exposed to high harm makes will gain avoidance (spend less time over male chambers) and prefer low harm males |
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give an example of a post copulation sexual conflict |
accessory gland proteins |
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describe the benefit in males from the sexual conflict of accessory gland proteins |
increase sperm competition, decrease mating receptivity of mate, increased short term reproduce potential of mate, speeds up ovulation |
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describe the benefits and cost in females from accessory gland proteins |
benefits- increased short term reprdutvei potential cost: decreases lifetime reproductive potential and life span |
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and is an accessory gland protein |
protein in sperm to help sperm reach egg or effect female behaviour |
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true or false when makes have a high male-male competition they invest more in ejaculate traits and thus more harmful to females |
true |
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what are intralocus sexual conflict |
within genes when fitness optimizing traits are controlled by the same gene between sexes only one gene involvd |
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give an example of intralocus sexual conflict |
one gene controls body size but selection favour large bodies in males and small females |
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describe the study for evidence of intralocus conflict |
both male and female larva have the same body size but as adults they differ in body size based on reproductive benefits |
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what is Interlocus sexual conflict and give an example |
between genes when a fitness optimizing trait is controlled by different genes between sexes ex) parental behaviour |
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do all males use exploitative behaviour |
no |
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who uses more harmful exploitative behaviour dominant or submissive males and why |
submissive males because they're not likely to win mates from fighting to they have the exploit females to reproduce |