ANSC 333 Exam 2 Test Questions With d d d d d d d
Verified Solutions d
How is sex determined genetically? -
d d d d d d
XX = female
d d d d d d d d d d d d
XY =male d
How is sex determined phenotypically? -
d d d d d d
vagina or penis
d d d d d d d d d d d d
How is sex determined gonadically? -
d d d d d d
testes or ovaries
d d d d d d d d d d d d
5 stages of sexual differentiation -
d d d d d d
Development of the indifferent gonad
d d d d d d d d d d d d d d
Differentiation of the gonad d d d
Differentiation of the internal genital organs d d d d d
Differentiation of external genitalia d d d
Development of secondary sex characteristics d d d d
When does development of the indifferent gonad take place? -
d d d d d d d d d d
early embryo
d d d d d d d d d d d
When does differentiation of the gonad take place? -
d d d d d d d d d
late embryo
d d d d d d d d d d d
When does differentiation of the internal genital organs take place? -
d d d d d d d d d d d
late embryo to fetal
d d d d d d d d d d d d d
When does differentiation of the external genitalia take place? -
d d d d d d d d d d
fetal
d d d d d d d d d d
When does development of secondary sex characteristics take place? -
d d d d d d d d d d
puberty
d d d d d d d d d d
Mesonephros - d d
acts as kidney in early embryo
d d d d d d d d d d d d d d d
Metanephros - d d
functional kidney in adult
d d d d d d d d d d d d d
Mesonephric duct - d d d
Makes male tract
d d d d d d d d d d d d
Paramesonephric duct - d d d
make female tract
d d d d d d d d d d d d
1|Page
, Where do primordial germ cells originate? -
d d d d d d d
in the yolk sac
d d d d d d d d d d d d d
Where do primordial germ cells migrate? -
d d d d d d d
towards the gonadal ridge
d d d d d d d d d d d d d
What two things can primordial germ cells become? -
d d d d d d d d d
-spermatogonial stem cells
d d d d d d d d d d d d
-egg nests d
Yolk sac - d d d
provides nutrients to embryo
d d d d d d d d d d d d d
Allantois - d d
collects embryos waste
d d d d d d d d d d d d
Who used rabbits to learn about differentiation of the gonad? -
d d d d d d d d d d d
Jost
d d d d d d d d d d
What was learned from Jost experiments? -
d d d d d d d
Female tract is default
d d d d d d d d d d d d d
Differentiation of gonads male development - d d d d d d
-SRY gene contains testes determining factor (TDF)
d d d d d d d d d d d d d d d d d
-Testes develop d
-Sertoli cells secrete anti-mullerian hormone (AMH)
d d d d d
-This causes paramesonephric duct to regress
d d d d d
-AMH causes leydig cells to differentiate into testosterone
d d d d d d d
-Testosterone cause male tract to develop d d d d d
-5a reductase converts testosterone to dihydrotestosterone
d d d d d
-dihydrotestosterone causes penis scrotum and accessory glands to develop d d d d d d d d
Undifferentiated sex chords becomes what? - d d d d d d
testes or ovaries
d d d d d d d d d d d d
What is another name for the mesonephric duct? -
d d d d d d d d d
Wolffian duct
d d d d d d d d d d d
What does mesonephric tubules become in adult male? -
d d d d d d d d d
epididymis
d d d d d d d d d d
What does mesonephric duct become in adult male? -
d d d d d d d d d
vas deferens
d d d d d d d d d d d
What do rete tubules become in adult male? -
d d d d d d d d d
rete testes
d d d d d d d d d d d
Differentiation of gonads female development - d d d d d d
-No TDF from SRY gene
d d d d d d d d d d d d d d
-ovaries develop as default d d d
2|Page
Verified Solutions d
How is sex determined genetically? -
d d d d d d
XX = female
d d d d d d d d d d d d
XY =male d
How is sex determined phenotypically? -
d d d d d d
vagina or penis
d d d d d d d d d d d d
How is sex determined gonadically? -
d d d d d d
testes or ovaries
d d d d d d d d d d d d
5 stages of sexual differentiation -
d d d d d d
Development of the indifferent gonad
d d d d d d d d d d d d d d
Differentiation of the gonad d d d
Differentiation of the internal genital organs d d d d d
Differentiation of external genitalia d d d
Development of secondary sex characteristics d d d d
When does development of the indifferent gonad take place? -
d d d d d d d d d d
early embryo
d d d d d d d d d d d
When does differentiation of the gonad take place? -
d d d d d d d d d
late embryo
d d d d d d d d d d d
When does differentiation of the internal genital organs take place? -
d d d d d d d d d d d
late embryo to fetal
d d d d d d d d d d d d d
When does differentiation of the external genitalia take place? -
d d d d d d d d d d
fetal
d d d d d d d d d d
When does development of secondary sex characteristics take place? -
d d d d d d d d d d
puberty
d d d d d d d d d d
Mesonephros - d d
acts as kidney in early embryo
d d d d d d d d d d d d d d d
Metanephros - d d
functional kidney in adult
d d d d d d d d d d d d d
Mesonephric duct - d d d
Makes male tract
d d d d d d d d d d d d
Paramesonephric duct - d d d
make female tract
d d d d d d d d d d d d
1|Page
, Where do primordial germ cells originate? -
d d d d d d d
in the yolk sac
d d d d d d d d d d d d d
Where do primordial germ cells migrate? -
d d d d d d d
towards the gonadal ridge
d d d d d d d d d d d d d
What two things can primordial germ cells become? -
d d d d d d d d d
-spermatogonial stem cells
d d d d d d d d d d d d
-egg nests d
Yolk sac - d d d
provides nutrients to embryo
d d d d d d d d d d d d d
Allantois - d d
collects embryos waste
d d d d d d d d d d d d
Who used rabbits to learn about differentiation of the gonad? -
d d d d d d d d d d d
Jost
d d d d d d d d d d
What was learned from Jost experiments? -
d d d d d d d
Female tract is default
d d d d d d d d d d d d d
Differentiation of gonads male development - d d d d d d
-SRY gene contains testes determining factor (TDF)
d d d d d d d d d d d d d d d d d
-Testes develop d
-Sertoli cells secrete anti-mullerian hormone (AMH)
d d d d d
-This causes paramesonephric duct to regress
d d d d d
-AMH causes leydig cells to differentiate into testosterone
d d d d d d d
-Testosterone cause male tract to develop d d d d d
-5a reductase converts testosterone to dihydrotestosterone
d d d d d
-dihydrotestosterone causes penis scrotum and accessory glands to develop d d d d d d d d
Undifferentiated sex chords becomes what? - d d d d d d
testes or ovaries
d d d d d d d d d d d d
What is another name for the mesonephric duct? -
d d d d d d d d d
Wolffian duct
d d d d d d d d d d d
What does mesonephric tubules become in adult male? -
d d d d d d d d d
epididymis
d d d d d d d d d d
What does mesonephric duct become in adult male? -
d d d d d d d d d
vas deferens
d d d d d d d d d d d
What do rete tubules become in adult male? -
d d d d d d d d d
rete testes
d d d d d d d d d d d
Differentiation of gonads female development - d d d d d d
-No TDF from SRY gene
d d d d d d d d d d d d d d
-ovaries develop as default d d d
2|Page
