Meiosis and Gametogenesis

Question 1

Phases of human development

Answer 1

Prenatal

Natal

Question 2

Pre natal development

Answer 2

Pre embryonic
Embryonic
Fetal

Question 3

Phases of Prophase 1

Answer 3

Lipotene
Zygotene
Pachytene
Diplotene
Diakinesis

Question 4

Lipotene

Answer 4

Condensation of chromosomes

Question 5

Zygotene

Answer 5

Bivalent or tetrad

Synaptonemal complex

Question 6

Pachytene

Answer 6

Cross over of non sister chromatids

Question 7

Cross over of non sister chromatids in the Pachytene phase occurs at

Answer 7

Recombination nodules

Question 8

Diplotene

Answer 8

Dissolution of the synaptonemal complex

Chiasmata remains

Question 9

The X-shaped structures formed during separation are known as

Answer 9

chiasmata.

Question 10

Diakinesis

Answer 10

termination of chiasmata
assembly of the meiotic spindle to separate the homologous chromosomes
Nucleus dissolves

Question 11

Metaphase 1

Answer 11

Assmeble at the equator

Question 12

Anaphase 1

Answer 12

Pulled toward polar ends

Sister chromatids stay together

Question 13

Telophase 1

Answer 13

Two nuclei form

Cytokinesis occurs

Question 14

Prophase 2

Answer 14

Condensation
Assembly of mitosis spindles
Nuclear membrane dissolves

Question 15

Metaphase 2

Answer 15

chromosomes line up end-to-end along the equator of the cell.

Question 16

Anaphase 2

Answer 16

The sister chromatids are then pulled to opposite poles
individual chromosomes.

Question 17

Telophase 2

Answer 17

two new cell nuclei.
cytokinesis.

Question 18

Until zygote changed into full term infant:

Answer 18

Cell growth
Differentiation
Organization occurs

Question 19

Spermatogenesis occurs in

Answer 19

Seminiferous tubules

Question 20

Spermiogenesis occurs in

Answer 20

Epididymis

Question 21

Hormones in spermiogenesis

Answer 21

Luteinizing hormone: cholesterol into testosterone from ledwig cells
Follicle stimulating hormone: Androgen binding protein from nurse cells

Question 22

ABP

Answer 22

Helps concentrate testosterone

Question 23

Spermiogenesis

Answer 23

Nucleus condenses
Cytoplasm sheds
Acrosome forms
Neck, body and tail form

Question 24

Estrogen

Answer 24

Causes proliferative phase of the uterine
Cervical mucus becomes hospitable or thinner
Causes LH surge

Question 25

LH

Answer 25

Stimulates completion of meiosis 1 Stimulates ovulation Stimulates progesterone release by luteum corpus

Question 26

Progesterone

Answer 26

Starts secretory phase

Question 27

Phases of the uterus

Answer 27

Menstrual Proliferative Secretory

Question 28

Phases of the ovary

Answer 28

Follicular phase | Literal phase

Question 29

Follicular phase corresponds with

Answer 29

Menstrual and proliferative phase

Question 30

Luteal corresponds with

Answer 30

Secretory phase

Question 31

Oogenesis

Answer 31

``` Oogonia 1° follicle Primordial follicle 2° follicle Graffian follicle ```

Question 32

Dispersal of corona radiata caused by

Answer 32

hyaluronidase enzyme

Question 33

Formation of a pathway through the zona pellucida results from the action of

Answer 33

Esterase Acrosin Neuraminidase

Question 34

A change in the properties of the zona pellucida, occurs that makes it impermeable to other sperms

Answer 34

zona reaction | Release of lysosomal enzymes into the perivitelline space

Question 35

Assistive reproductive tech

Answer 35

IVF | Cryopreservation

Question 36

Before fertilization

Answer 36

Capacitation | Acrosomal reaction

Question 37

During fertilization

Answer 37

Loosening of corona radiate or penetration | Recognition(same species)

Question 38

After fertilization

Answer 38

Zona reaction or monospermy | release from cortical granules

Question 39

Contraceptive methods

Answer 39

Barrier- condom Hormonal- pills IUD/ mucus thickening/ copper

Question 40

Causes of Infertility in female

Answer 40

PID Immunity Cx mucus

Question 41

Causes of infertility in male

Answer 41

Oligozoospermia- few alive sperms azoospermia- no alive sperms