PSY 357/ PSY357 Grand Canyon
University -Psy-357 Exam 1 Questions
With Complete Solutions|| GRADED A+||
LATEST UPDATE 2026
Key -CORRECTANSWER F = Female, M = Male, WPC = weeks post conception, CL=
corpus luteum, -FBL = negative feedback loop, +FBL = positive feedback loop
Biological determination of sex -CORRECTANSWER Chromosomes, gonads, internal
reproductive organs, external genitalia, brain differentiation
Pluripotentiality -CORRECTANSWER undifferentiated structures exist at each stage,
then differentiate into male or female or in between determined by genes and biological
environment
chromosomal stage -CORRECTANSWER 2 sex chromosomes ( XX or XY), Y has little
genetic information, X has a lot
Intersex chromosomes -CORRECTANSWER Individuals identified as M of F at birth
may have a sex chromosome make up other than XY or XX
Turner syndrome -CORRECTANSWER Only 1 sex chromosome (45, XO), from
fertilization of a gamete missing 23rd ch
,intersex -CORRECTANSWER functional ovaries do not develop, identified as F at birth
by external genitalia, at puberty F secondary sec characteristics do not begin to develop
due to lack of estrogen (estrogen treatment can stimulate development)
Klinefelter's syndrome -CORRECTANSWER XXY, M presenting at birth, Have testicles
but lower functioning, delayed/no puberty
Gametes -CORRECTANSWER primordial germ cells that have differentiated into ova
and sperm
Gonadal stage -CORRECTANSWER Gonads are glands that produce gametes and sex
hormones, 3 WPC PGCs form in yolk sac, then become gametes, 4 WPC
undifferentiated gonads formed, 6 WPC all PGCs received
M gonads -CORRECTANSWER 2 testes, Requires SRY gene, 7 WPC Medulla of
undifferentiated gonad develops into a testis, Cortex disappears
SRY gene -CORRECTANSWER On Y chromosome, produces transcription factors that
prompt testis development
, F Gonads -CORRECTANSWER 2 ovaries,Requires: Absence of Y chromosome (no
SRY gene), Presence of 2 x chromosomes containing PGCs, (XO not sufficient), 7
WPC Cortex of undifferentiated gonad develops into ovary, Medulla disappears
Intersex gonads -CORRECTANSWER Gonadal dysgenesis, no functional gonads
develop
OT DSD -CORRECTANSWER Ovotesticular disorder of sexual development,
Ovotestes from gonad develop functional ovarian and testicular tissue (Estradiol
production inhibits spermatogenesis)
internal reproductive organs stage -CORRECTANSWER 6 WPC precursors present,
Wolffian ducts (M) and Mullarian ducts (F) both found at this stage regardless of
differentiation
M internal reproductive organs -CORRECTANSWER epididymis, vas deferens, seminal
vesicles, testes begin producing Androgen and Anti- Mullerian hormone
Androgen -CORRECTANSWER masculinizing, stimulates development of wolffian
ducts into epididymis, vas deferens, seminal vesicles
Anti Mullerian hormone -CORRECTANSWER defeminizing, causes the regression of
mullerian ducts
University -Psy-357 Exam 1 Questions
With Complete Solutions|| GRADED A+||
LATEST UPDATE 2026
Key -CORRECTANSWER F = Female, M = Male, WPC = weeks post conception, CL=
corpus luteum, -FBL = negative feedback loop, +FBL = positive feedback loop
Biological determination of sex -CORRECTANSWER Chromosomes, gonads, internal
reproductive organs, external genitalia, brain differentiation
Pluripotentiality -CORRECTANSWER undifferentiated structures exist at each stage,
then differentiate into male or female or in between determined by genes and biological
environment
chromosomal stage -CORRECTANSWER 2 sex chromosomes ( XX or XY), Y has little
genetic information, X has a lot
Intersex chromosomes -CORRECTANSWER Individuals identified as M of F at birth
may have a sex chromosome make up other than XY or XX
Turner syndrome -CORRECTANSWER Only 1 sex chromosome (45, XO), from
fertilization of a gamete missing 23rd ch
,intersex -CORRECTANSWER functional ovaries do not develop, identified as F at birth
by external genitalia, at puberty F secondary sec characteristics do not begin to develop
due to lack of estrogen (estrogen treatment can stimulate development)
Klinefelter's syndrome -CORRECTANSWER XXY, M presenting at birth, Have testicles
but lower functioning, delayed/no puberty
Gametes -CORRECTANSWER primordial germ cells that have differentiated into ova
and sperm
Gonadal stage -CORRECTANSWER Gonads are glands that produce gametes and sex
hormones, 3 WPC PGCs form in yolk sac, then become gametes, 4 WPC
undifferentiated gonads formed, 6 WPC all PGCs received
M gonads -CORRECTANSWER 2 testes, Requires SRY gene, 7 WPC Medulla of
undifferentiated gonad develops into a testis, Cortex disappears
SRY gene -CORRECTANSWER On Y chromosome, produces transcription factors that
prompt testis development
, F Gonads -CORRECTANSWER 2 ovaries,Requires: Absence of Y chromosome (no
SRY gene), Presence of 2 x chromosomes containing PGCs, (XO not sufficient), 7
WPC Cortex of undifferentiated gonad develops into ovary, Medulla disappears
Intersex gonads -CORRECTANSWER Gonadal dysgenesis, no functional gonads
develop
OT DSD -CORRECTANSWER Ovotesticular disorder of sexual development,
Ovotestes from gonad develop functional ovarian and testicular tissue (Estradiol
production inhibits spermatogenesis)
internal reproductive organs stage -CORRECTANSWER 6 WPC precursors present,
Wolffian ducts (M) and Mullarian ducts (F) both found at this stage regardless of
differentiation
M internal reproductive organs -CORRECTANSWER epididymis, vas deferens, seminal
vesicles, testes begin producing Androgen and Anti- Mullerian hormone
Androgen -CORRECTANSWER masculinizing, stimulates development of wolffian
ducts into epididymis, vas deferens, seminal vesicles
Anti Mullerian hormone -CORRECTANSWER defeminizing, causes the regression of
mullerian ducts
