class 16 sex and gender ii- sex ratios and sex selection Flashcards Preview

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Flashcards in class 16 sex and gender ii- sex ratios and sex selection Deck (11):
1

chromosomal sex determination

physiological sex of individual is at base determined by the combination of sex chromosomes the individual bears

XX, XY

2

genotypic sex and phenotypic sex

may not align

3

two sexes

male, female

4

intersex

posessing reproductive or sexual anatomy that doesnt seem to fit the typical definitos of female or male

5

gender

refers to how an individual percieves themselve (gender indetity) and presents themselves to others (gender presentation)

6

sexual orientaiton

targts of sexual and/or romantic attraction to which an individual feels- heterosexuality, homosexuality, bisexuality

7

evolution of sex ratios

fisher outlined basic expectations for sex ratios within populations- we typically expect 1:1 sex ratio

8

adjustments to a 1:1 sex ratio

hamilton- optimal sex ratio
mating system
unequal mortality of one sex
adjustments in sex ratio as an adaptive reproductive strategy

9

unequal mortality of one sex

often males

10

adjustments in sex ratio asn adaptive reproductive strategy

trivers willard hypothesis (predicts females in a position to produce high quality sons will exhibit a male biased sex ratio among offspring due to higher potential reproducie success of males)

11

assisted reproductive strategy (ART)

ethical? preimplantation genetic diagnosis- PGD

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