Sex

Question 1

What is genetic sex

Answer 1

XX or XY

Question 2

What is pheynotypic sex?

Answer 2

external appearance determined by endocrine influences

Question 3

What is legal sex?

Answer 3

sex used for official documents.

In cases where phenotypic gender is uncertain at birth it may be assigned later in life.

Question 4

What is sexual determination dependant on?

Answer 4

it is a genetically controlled process dependant on the Y chromosome.

Question 5

What is the key gene in sexual determination?

Answer 5

the SRY (sex determining region Y) which determines whether a testis or ovary will form.

formation of testis then regulates sexual differentiation.

Question 6

What develops from the wolffian duct? (4)

Answer 6

epididymis
vas deferens
seminal vesicles
ejaculatory duct

Question 7

What develops from the mullerian ducts? (3)

Answer 7

fallopian tubes
uterus
upper part of vagina

Question 8

What develops from the mullerian ducts? (3)

Answer 8

fallopian tubes
uterus
upper 1/3rd part of vagina

Question 9

What do the sertoli cells do?

Answer 9

express SRY

produce AMH which inhibitis mullerian duct formation

Question 10

What do Leydig cells do?

Answer 10

Do not express SRY

produce testosterone which stimulates wolffian ducts