Intro to Embryology

Question 1

What is the process called where diploid cells give rise to haploid cells?

Answer 1

Meiosis

Question 2

How many cell divisions happen in meiosis?

Answer 2

Two cell divisions
Meiosis I and Meiosis II

Question 3

Meiosis gives you how many daughter cells?

Answer 3

Four

Question 4

How many chromosomes are in each new daughter cell after meiosis?

Answer 4

23 chromosomes and one sex cell

Question 5

What is the process by which germ cells (or gametes) are produced and mature?

Answer 5

Gametogenesis

Question 6

How many chromosomes do gametes have?

Answer 6

23

Question 7

Female gamete is an

Answer 7

Egg

Question 8

The male gamete is a

Answer 8

Sperm

Question 9

When a female and a male gamete unite, they form a what?

Answer 9

Zygote

Question 10

How many chromosomes in a zygote?

Answer 10

46

Question 11

Oogenesis produces what?

Answer 11

female gametes (ova/egg)

Question 12

In what week of embryonic life do primordial germ cells arrive in the ovary from the yolk sac?

Answer 12

5th week

Question 13

Is proliferation of the oogonia- female stem cells (rapid/slow) during fetal life?

Answer 13

Rapid

Question 14

When does the meiosis of primary oocytes begin?

Answer 14

Before birth- but stops before the first division is complete and remains in the arrested phase until puberty

Question 15

Are primary oocytes vulnerable to damage as they age?

Answer 15

Yes! Syndromes are more likely

Question 16

How many eggs will mature during a woman’s life?

Answer 16

400-500

Question 17

The pituitary gland produces which important hormones in the growth of oocytes and formation of zona pellucida?

Answer 17

Follicle-stimulating hormone FSH and Luteinizing Hormone (LH)

Question 18

The maturation of oocytes takes a primary oocyte and divides it into what two things?

Answer 18

Secondary oocyte and polar body- these then split into one egg and three polar bodies