3. Reproduction And Inheritance

Question 1

List the differences between sexual and asexual reproduction

Answer 1

Sexual:
.gametes produced
.fertilisation takes place
.genetic variation in off spring
.has survival value in changing environment
Asexual:
.no gametes produced
.fertilisation doesn’t take place
.no genetic variation in offspring
.has survival value in a stable environment

Question 2

How does fertilisation take place?

Answer 2

Involves the fusion of a male gamete to produce a zygote that undergoes cell division and develops into an embryo

Question 3

How is the female reproductive system adapted for its functions?

Answer 3

.ova produced every 28 days
.endometrium has a good blood supply for implantation off an embryo

Question 4

What is the role of progesterone in the menstrual cycle?

Answer 4

.maintains uterus lining
.inhibits LH and FSH

Question 5

What is the role of oestrogen in the menstrual cycle?

Answer 5

.build up of uterus lining
.stimulates release of LH

Question 6

What is the role of LH in the menstrual cycle?

Answer 6

.stimulates the release of an egg

Question 7

What is the role of FSH in the menstrual cycle?

Answer 7

.causes egg to mature
.stimulates ovaries or produce oestrogen

Question 8

How is the male reproductive system adapted for its function?