Meiosis

Question 1

failure of separation in meiosis I or meiosis II results in gametes with one extra chromosome and other gametes lacking a chromosome.

Answer 1

non-disjunction

Question 2

Meiosis consists of how many divisions?

Answer 2

2

Question 3

Meiosis in spermatogenesis results in how many haploid sperm?

Answer 3

4

Question 4

Meiosis in oogenesis results in how many haploid ovum?

Answer 4

1

Question 5

In oogenesis, the primary oocyte has how many chromosome number?

Answer 5

2n

Question 6

In oogenesis, the secondary oocyte has how many chromosome number?

Answer 6

n

Question 7

In oogenesis the primary oocyte is arrested in

Answer 7

Prophase I of Meiosis I

Question 8

In oogenesis the primary oocyte completes MI after

Answer 8

ovulation

Question 9

In oogenesis the secondary oocyte arrested in

Answer 9

Metaphase II of Meiosis II

Question 10

In oogenesis the secondary oocyte completes Meiosis II

Answer 10

fertilization

Question 11

The products of oogenesis are

Answer 11

2nd polar body and 1 ovum

Question 12

In spermatogenesis the primary spermatocyte has ____ chromosome number

Answer 12

2n

Question 13

In spermatogenesis the secondary spermatocyte has ___ chromosome number

Answer 13

n

Question 14

-Stem sperm cells undergo mitosis then ___

Answer 14

Meiosis

Question 15

put in correct order: sperm, spermatogonium, secondary spermatocyte, Primary spermatocyte

Answer 15

Spermatogonium< Primary spermatocyte< Secondary spermatocyte< sperm

Question 16

In spermatogenesis how may chromosome and chromatids (actual number) in a spermatogonium?

Answer 16

46 chromosomes, 92 chromatids (46 x 2 = 92)

Question 17

In spermatogenesis how may chromosome (actual number) in a primary spermatocyte?

Answer 17

46 chromosomes, 92 chromatids (46 x 2 = 92)

Question 18

In spermatogenesis how may chromosome (actual number) in a secondary spermatocyte?

Answer 18

23 chromosome, 46 chromatids (23 x 2 = 46)

Question 19

In oogenesis how many chromosomes and chromatids (actual number) does a oogonium have?

Answer 19

46 chromosomes, 92 chromatids (46 x 2 = 92)

Question 20

In oogenesis how many chromosomes and chromatids (actual number) primary oocyte have?

Answer 20

46 chromosomes, 92 chromatids (46 x 2 = 92)

Question 21

In oogenesis how many chromosomes and chromatids (actual number) secondary oocyte have?

Answer 21

23 chromosome, 46 chromatids (23 x 2 = 46)

Question 22

separation of homologous chromosomes

Answer 22

Meiosis I

Question 23

separation of chromosomes in Meiosis occurs at

Answer 23

Anaphase II in Meiosis II

Question 24

non-disjunction in Meiosis I is catastrophic because it results in…

Answer 24

2 trisomies and 2 monosomies
Trisomy ( 3 chromosomes one cell) : small chance of survival - down syndrome

Monosomy: (lack 1 chromosome therefore only have one chromosome from either mother or father)- fatal

Question 25

non-disjunction in Meiosis II will result in …

Answer 25

1 trisomy, 1 monosomy, and 2 normal