Sex differentiation

Question 1

gene of y chromosome

Answer 1

SRY

Question 2

SRY gene codes for

Answer 2

TDF (testis determining factor)

Question 3

True or false: SRY gene is only found on Y chromosome

Answer 3

true

Question 4

Stage at which both male 46, XX and 46, XY fetuses have similar sex organ

Answer 4

4th -5th week

Formation of organs common to both sexes

Question 5

if Y is present, what degenerates and develops?

Answer 5

Degenerates: Mullerian ducts

Wolffian ducts : develop

Question 6

If Y is absent what degenerates and develops

Answer 6

Degenerates: wolffian

Develops : Mullerian

Question 7

indifferent structure: Genital ridge

Identify the female and male derivatives

Answer 7

Male : Testis
Female: Ovary

Question 8

indifferent structure: Primordial germ cells

identify the female and male derivatives

Answer 8

male: Spermatozoa
Female: Oocyte

Question 9

Indifferent structure:
Wolffian duct/ Mesonephric duct

identify the female and male derivatives

Answer 9

Male: Appendix of epididymis
Female: Appendix of ovary Gartner’s duct

Question 10

Indifferent structure: Definitive urogenital siinus

Answer 10

Male: Penile urethra
Female: Lower vagina / Vaginal tubercle

Question 11

indifferent structure: Gental tubercule

identify the female and male derivatives

Answer 11

Male: penis
Female: Clitoris