· Humming birds males with territories that hold good nectar will attract more females o Direct benefit for females 3) guppies, and discuss how the data we examined support these conclusions. In guppies, there is a strong correlation between ornamentation and attractiveness Yet males with high ornamentation decrease the number of sons produced …
· Sexual selection may be a way for females to choose males with 'good genes' 5) Parental investment is a key predictor of which sex will have the most extravagant sexually-selected characters. True 6) Would you expect a species with relatively equal investment in reproduction to be sexually dimorphic (different in appearance) or monomorphic ...
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· Question 1 Needs Grading Describe the relationship between sexual selection and predation as it relates to male guppy coloration. Give examples as you explain the relationship. Selected Answer: Male guppy coloration is a sexual selection and predation. This is because the males that are brightly colored have a high success rate of mating as they are choosen by the …
3) The first researcher to propose the theory of sexual selection was… Charles Darwin
2) Bateman's principle was based on a study of male fruit fly success. He found ....(check all that apply) That some male fruit flies reproduced a lot more than others and many did not mate at all. That male mating success is not consistent between individuals
their mates. Sexual selection may be a way for females to choose males with 'good
Natural selection is associated to traits that enhance the survival of their bearers or bearers descendents
When offspring need no parental care - most gene copies passed on if both parents leave immediately after mating (most species do this)
in diploid organisms having only one allele for a given trait
Social Behavior and Social Systems are Shaped by Natural Selection
long tailed males genetically make offspring also resistant to parasites
Harem sixe is correlated with dimorphism in primates
They have alleles that make them competitive - it should gain them access to mate with them, and the offspring then carry competitive gene and will be selected for because allow them to acquire more mates and improve reproductive success
environment tends to have differential reproductive success caused by differences in survival or the ability to acquire resources, sexual selection the differences in reproductive success are caused by the ability to attract mates.
There is more variation in reproductive and number of offspring success - higher variance in male mating success. Higher variance in male reproductive success. Sexual selection on males is stronger. (mating success generally more important for overall success)
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Evolutionary model of mate choicein which females receive more than direct resources-- they get spermand from that receive genes that are passed onto offspring
Evolutionary model for mate choicethat states that sexual selection favors females that have genetic predisposition to choose mates that providethem with some tangible resourcethat increases their fecundity
Evolutionary model of mate choicefirst proposed by Sir Ronald Fisher
Ex: In a clutch, female offspring prefer bright colors, and males HAVE bright colors