BIO A 208: Exam 2 with correct answers
Sexual Selection - correct answer -results from competition for mats: relative parental investment ->
relative reproductive rates -> operational sex ratio -> human mating system (mild polygyny)
Predictions from sexual selection theory - correct answer -Men competitive compared to women
Men choosy compared to other male mammals
Women choosy compared to men
Women more competitive compared to other female mammals
Cohen's d - correct answer -a method of quantifying sex differences and shows difference in the
means/pooled standard deviation (large d=.8 medium d=.5 small d=.2)
d = (Mm-Mf)/SD
Clark and Hatfield study - correct answer -Supports theory that men are more choosy than other male
mammals
25% of men declined sex
Even more men declined higher commitment propositions
SRY Gene - correct answer -typically not on the X chromosome; must be present for male development;
could be responsible for TDF
TDF - correct answer -Testis Determining Factor; signals development of the testes which are largely
responsible for other male features
Androgens - correct answer -male hormones
Target Tissues - correct answer -external genitalia
, Mullerian/Wolfian ducts, brain
Androgen receptors - correct answer -differential androgen in the brain leads to sex differences in
psychology/behavior
Organizational Effects - correct answer -processes that have life-long irreversible effects on behavior
Activational Effects - correct answer -processes that have temporary effects
Mullerian Ducts - correct answer -females
Wolfian Ducts - correct answer -Males
Mounting vs Lordosis behavior - correct answer -neonatal hormone manipulation; responses can be
changed with early hormone manipulation
Human Psychological sex differences - correct answer -Sexual Orientation
Interest in visual sexual stimuli
Interest in causal sex
Childhood play
Job interests
physical aggression
Complete Androgen Insensitivity (CAIS) - correct answer -malfunctioning of androgen receptors
XY males: look female and brains look female (influences sexual orientation)
5-Alpha Reductase Deficiency - correct answer -insufficient androgen to virilize genitalia; sufficient T
does not become DHT; begins life looking female
At puberty male characters begin to develop (masculinizes genitalia and appearances)
Many adjust well to life as male
Sexual Selection - correct answer -results from competition for mats: relative parental investment ->
relative reproductive rates -> operational sex ratio -> human mating system (mild polygyny)
Predictions from sexual selection theory - correct answer -Men competitive compared to women
Men choosy compared to other male mammals
Women choosy compared to men
Women more competitive compared to other female mammals
Cohen's d - correct answer -a method of quantifying sex differences and shows difference in the
means/pooled standard deviation (large d=.8 medium d=.5 small d=.2)
d = (Mm-Mf)/SD
Clark and Hatfield study - correct answer -Supports theory that men are more choosy than other male
mammals
25% of men declined sex
Even more men declined higher commitment propositions
SRY Gene - correct answer -typically not on the X chromosome; must be present for male development;
could be responsible for TDF
TDF - correct answer -Testis Determining Factor; signals development of the testes which are largely
responsible for other male features
Androgens - correct answer -male hormones
Target Tissues - correct answer -external genitalia
, Mullerian/Wolfian ducts, brain
Androgen receptors - correct answer -differential androgen in the brain leads to sex differences in
psychology/behavior
Organizational Effects - correct answer -processes that have life-long irreversible effects on behavior
Activational Effects - correct answer -processes that have temporary effects
Mullerian Ducts - correct answer -females
Wolfian Ducts - correct answer -Males
Mounting vs Lordosis behavior - correct answer -neonatal hormone manipulation; responses can be
changed with early hormone manipulation
Human Psychological sex differences - correct answer -Sexual Orientation
Interest in visual sexual stimuli
Interest in causal sex
Childhood play
Job interests
physical aggression
Complete Androgen Insensitivity (CAIS) - correct answer -malfunctioning of androgen receptors
XY males: look female and brains look female (influences sexual orientation)
5-Alpha Reductase Deficiency - correct answer -insufficient androgen to virilize genitalia; sufficient T
does not become DHT; begins life looking female
At puberty male characters begin to develop (masculinizes genitalia and appearances)
Many adjust well to life as male
