Development of Reproductive Tracts

Question 1

What is the Cloaca?

Answer 1

Common opening where the uro-genital and GI tract come together

Question 2

What is the urogenital ridge?

Answer 2

Section of intermediate mesoderm where the embryonic kidney and gonads both come from

Question 3

What are primordial germ cells?

Answer 3

Common origin of spermatoza and oocytes

Question 4

Expression of which gene causes male characteristics to develop?

Answer 4

SRY gene

Question 5

What are the altenate names for the Mesonephric and Paramesonephric ducts?

Answer 5

Wolffian & Mullerian

Question 6

What happens to the 2 ducts in a normal male?

Answer 6

Mullerian inhibiting hormone suppresses duct development & androgens support mesonephric duct

Question 7

What happens to the 2 ducts in a normal female?

Answer 7

No testes producing MIH so the pasamesonephric duct develops & no androgens produced so the mesonephric duct degenerates

Question 8

What does the wolffian duct become?

Answer 8

Vas deferens and epididymis

Question 9

Where does the paramesonephric duct come from?

Answer 9

Invaginations of the epithelium of the urogenital ridge

Question 10

What structures form the uterus and vagina?

Answer 10

Paramesonephric duct forms the uterus and top of the vagina, ectoderm forms the rest of the vagina

Question 11

How is the male and female external genitalia formed?

Answer 11

Male : fusion of genital folds to form urethra and genital tubercle becomes glands of penis. Female : No fusion