Cell Divisions & Gametogenesis

Question 1

What are the gametes?

Answer 1

Sperm and ovum

Question 2

How many chromosomes germ cells have?

Answer 2

46

Question 3

Is a sequence of events by which (oogonia) are transformed into mature oocytes

Answer 3

Oogenesis

Question 4

When oogenesis begins?

Answer 4

Starts Before birth

Question 5

The primary oocyte enclosed by?

Answer 5

Primordial follicle

Question 6

Acellular glycoprotein surround the primary oocyte?

Answer 6

Zona pellucida

Question 7

When can we say secondary follicle?

Answer 7

If the primary follicle has more then one layer

Question 8

Dose primary oocytes form after birth?

Answer 8

Nooo

Question 9

When primary oocytes begins the first meiotic(meiosis) division?

Answer 9

Before birth

Question 10

When primary oocytes finishes the first meiotic division?

Answer 10

Before ovulation

Question 11

When Primary oocytes prophase occurs?

Answer 11

Adolescence, because the first meiotic division end before the ovulation and ovulation occurs in adolescence.

Question 12

If the follicle mature what happens to the primary oocytes?

Answer 12

Increases in size (علاقة طرديه)

Question 13

What is the function of polar body?

Answer 13

Non-functional that soon degenerate

Question 14

At ovulation the oocytes in which phase will be at?

Answer 14

Second meiotic division but progresses only to metaphase

Question 15

When can the secondary oocytes finish the metaphase?

Answer 15

If the spermatozoa(sperm) penetrate to the oocytes, in other words fertilization

Question 16

How we know if the oocyte matures is completed?

Answer 16

If the polar body is extracted

Question 17

How many primary oocytes in newborn ovaries?

Answer 17

2 million

Question 18

How many secondary oocytes that expelled ovulation?

Answer 18

400

Question 19

In adolescence how many primary oocytes?

Answer 19

40 thousand

Question 20

Shorting and thicking of chromosomes takes place

Answer 20

Prophase

Question 21

Chromosomes come in equator in the centre of the cell

Answer 21

Metaphase

Question 22

Chromosomes divides into tow part

Answer 22

Anaphase

Question 23

Lengthening and thinning of chromosomes and tow daughter cells formation

Answer 23

Telophase

Question 24

Name the tail pieces

Answer 24

Middle piece, principal piece, end piece

Question 25

In the sperm where can you find the mitochondria?

Answer 25

Middle piece