Gametogenesis Ppt

Question 1

• Process of creating gametes

Answer 1

Gametogenesis

Question 2

Germ cells are set aside early in development

Migrate to the____

Undergo____ divisions to make haploid germ cells

Answer 2

gonad

meiotic

Question 3

Process of producing sperm

Occurs in______ of the testes

Answer 3

Spermatogenesis

seminiferous tubules

Question 4

• Process of producing oocytes

• Occurs in the____

Answer 4

Oogenesis

ovaries

Question 5

___________ are the germ cells that will eventually develop into the mature sperm;

the first step in this development is the duplication of _______ to get ready for meiosis

Answer 5

Spermatogonia

homologous chromosomes

Question 6

:the first meiotic division separates the homologous chromosomes from each parent

Answer 6

Primary spermatocyte

Question 7

______: the second meiotic division separates the 2 chromatids and creates_____

Answer 7

Secondary spermatocyte

4 haploid cells

Question 8

_____: Will produce 4 sperm cells by the process of______.

Answer 8

Spermatids

spermiogenesis

Question 9

differentiate into the shape we commonly know

Answer 9

Sperm cells

Question 10

produces sperm cells.

Answer 10

Meiosis

Question 11

Diploid cells divide through mitosis in the linings of the____

Some of the daughter cells then undergo meiosis, producing_____ which differentiate into mature sperm cells.

Answer 11

seminiferous tubules

haploid spermatocytes

Question 12

Sperm formation

Answer 12

spermatogenesis

Question 13

have the normal diploid number of 23 chromosome pairs.

Answer 13

Primary spermatocytes

Question 14

The large pair of chromosomes represents______

The X and Y chromosomes are____

Answer 14

autosomes (non sex chromosomes)

sex chromosomes

Question 15

STRUCTURE OF SPERM
• SIZE:

Answer 15

0.006 cm (0.0023 inch)

Question 16

STRUCTURE OF SPERM

•____
______:
- contains enzyme that help the cell penetrate the oocyte

•_____
______:
- energy for motility

•___

Answer 16

Head-Acrosome

Body or Midpiece-Mitochondria

Tail

Question 17

are the germ cells that will eventually develop into the mature oocytes

Answer 17

Oogonia

Question 18

: Undergoes the first meiotic division, separating homologous chromosomes

Answer 18

Primary oocyte

Question 19

:the second meiotic division separates the 2 chromatids and creates 4 haploid cells

Answer 19

Secondary oocyte

Question 20

Egg:
In females. it produces_____ and____.

This allows the egg to retain more________ to support early stages of development

Answer 20

1 egg (ovum)

3 polar bodies

cytoplasm

Question 21

______in a female produces a secondary oocyte and a polar body.

Answer 21

Meiosis

Question 22

Unequal division enables the cell destined to become a fertilized ovum to accumulate most of the cytoplasm and organelles from the primary oocyte, but with only ______copy.

Answer 22

one genome

Question 23

The_____ accumulates abundant cytoplasm that would have gone into the meiotic product that became the polar body if the division had been equal.

Answer 23

oocyte

Question 24

Ovum formation

Answer 24

oogenesis

Question 25

Primary oocytes - have the

Answer 25

diploid number of 23 chromosome pairs

Question 26

T or F

Meiosis in females is UNEVEN, concentrating most of the cytoplasm into one large cell called an oocyte for egg.

Answer 26

True

Question 27

The other products of meiosis, called_____, contain the other three sets of chromosomes and normally degenerate

Answer 27

polar bodies

Question 28

What happens with Polar bodies?
• By end of meiosis II you have a total of____ polar bodies
•____ by the woman’s body
• Rarely fertilized by the sperm
- If fertilized will become a____

Answer 28

3

Absorb

blighted ovum

Question 29

Before birth millions of Oocytes arrest in

Answer 29

PROPHASE I

Question 30

Puberty:_____ oocytes remains

Answer 30

400,000

Question 31

After puberty: ____continues and halts at_____

Answer 31

meiosis I

Metaphase II

Question 32

Penetration of _____completes female meiosis

Answer 32

oocyte membrane

Question 33

• A female ovulates about___ oocytes between puberty and menopause

Answer 33

400