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14 Cards in this Set
- Front
- Back
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sex differences-
males? |
males:
stronger sex drives (1,000x) -interested in porn -pay for prostitution -commit sexual assaults violent crimes interest in sexual appearance |
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sex differences-
females? |
stronger maternal instincts
interest in paternal care quality |
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sperm cell (spermatozon)-
what is involved in motility? what is a mitochondria sheath? three characteristics? what is acrosome? |
head-nucleus (5um)
tail-flagellum (50um) energy source mutation>poor mobility>male infertility acrosome: egg penetration digestive enzymes |
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human ovum-
what is it known as? size? describe. two protective layers? |
non motile
largest cell in the human body corona radiata layer follicle cells zona pellucida matrix materials |
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sperm cell penetration-
what does it do? then what happens? which does? what is this reaction called? what occurs? |
passes through corona radiata
binding to zona pellucida trigger ovum response cortical reaction ovum releases enzymes dissolves zona pellucida permits sperm penetration -release DNA into center of egg |
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fertilization-
what are the two parts? |
transformation
-ovum completes meiosis to form haploid pronucleus -sperm->pronucleus fusion of pronuclei -forming a diploid nucleus |
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ova development-
what are the two aspects? |
oocytes (premature ova)
-development begins during embryonic development -at birth-~2million oocytes ova production -resume at puberty -cease at menopause -under hormonal control |
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female hormones-
two aspects? what are the major hormones? |
cyclical
major hormones: -follicle *stimulating hormone -estradiol *stimulates ova maturation -luteinizing hormone *stimulates ova release -progesterone *prepares endometium for pregnancy |
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human sperm development-
what is it? begins when? life cycle? what is the site of prod? duration of development? |
non cyclical
begins at puberty until death reduction in quantity w/ age site of production: epididymis duration of dev: 64 days |
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evolution of gametes-
sperm as the what? characteristics? ova as what? characteristics? |
searcher
small (economical to produce) motile (search for the ova) ova as the nurturer large w/nutrients for embryonic dev. immobile |
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operation sex ratio-
what is it? what is conception? male receptivity? |
the ratio btwn sexually receptive males to sexually receptive females
human female receptivity one egg each month two to three days each month at all times 200 million sperm each ejaculation |
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OSR on animal behavior-
biased toward what? what is the bias? what is the law of supply and demand? |
males
more males are sexually receptive that females competition males compete females choose |
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three general competing mechanisms-
name the three? |
fighting
-weapons attraction -oranaments coercion -force mating |
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male competition tactics-
name seven? |
terr. defense
fighting for mates mate defense resource defense mating gift scramble competition mate attraction |
