Explaining Gender Development

Question 1

Characteristics are called

Answer 1

Phenotypes

Question 2

1. Gonads begin to develop producing

Answer 2

Both sex cells and hormones- they stays the same for the first 8 weeks

Question 3

2.gene on Y chromosome…

Answer 3

SRY dictates whether organs become testes or ovaries.
SRY presents the enzyme, testes-determining factors
If SRY is absent then foetus becomes female.

Question 4

3.teste producing hormone (androgen) prevents female foetal development. Androgen- testosterone= external male organs
BIRTH-

Answer 4

Gonads active in puberty.

Secondary characteristics- develop by the gland- hypothalamus.

Question 5

4. Hypothalamus affects anterior pituitary gland- gonads become active again.

Answer 5

Androgen- produces diff amounts of testosterone and oestrogen for both sexes.

RANDOM PROBLEMS CAN OCCUR AT ANY STAGE.

Question 6

Sex cells are called

Answer 6

Genotypes

Question 7

Evidence

Answer 7

Pfeiffer- removed sex organs from male and female newborn rats and all of their pituitary glands gave female hormones.
He implanted testes and they all produced male sex hormones.
Suggests testosterone causes sex difference in hypothalamus.