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14 Cards in this Set

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  • Back
sex differences-
males?
males:
stronger sex drives (1,000x)
-interested in porn
-pay for prostitution
-commit sexual assaults

violent crimes

interest in sexual appearance
sex differences-
females?
stronger maternal instincts

interest in paternal care quality
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
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
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
fertilization-
what are the two parts?
transformation
-ovum completes meiosis to form haploid pronucleus
-sperm->pronucleus

fusion of pronuclei
-forming a diploid nucleus
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
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
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
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
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
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
three general competing mechanisms-
name the three?
fighting
-weapons
attraction
-oranaments
coercion
-force mating
male competition tactics-
name seven?
terr. defense
fighting for mates
mate defense
resource defense
mating gift
scramble competition
mate attraction