Differentiation Of Genitalia

Question 0

What happens to the gonads in males?

Answer 0

Medullary cords develop
Cortex regresses
Leydig and Sertoli cells appear
Thick tunica albunginia forms

Question 1

When do the genitalia begin to differentiate?

Answer 1

At 7 weeks

Question 2

What happens to the ducts in males?

Answer 2

Presence of MIS causes mullarian duct to degenerate
Presence of testicular testosterone causes wolffian duct to grow into the seminiferous tubules, epididymis, and vas deferens.

Question 3

What happens to the external genitalia in males?

Answer 3

The presence of DHT causes:
The genital tubercle elongates (forms the glans penis)
The genital folds fuse to form the spongy urethra
The labioscrotal swellings form the scrotum

Question 4

What happens to the gonads in females?

Answer 4

The medullary cords degenerate
The medulla regresses
The cortex grows to form the ovaries

Question 5

What happens to the ducts in females?

Answer 5

The wolffian duct degenerates (no testosterone)

The mullarian duct grows to form the Fallopian tubes, uterus, cervix, and upper vagina (no MIS)

Question 6

What happens to the external genitalia in females?

Answer 6

The genital tubercle become the clitoris
The genital folds do not fuse and become the labia minora
The labioscrotal swelling form the labia majora