Meiosis/ Gametogenesis

Question 1

Primordial Germ cells originate at _____

Answer 1

3 weeks of gestation

Question 2

Germ cells migration to hindgut

Answer 2

5 weeks of gestation

Question 3

Difference between germ cells of male and female

Answer 3

Female germ line undergoes meiosis at 2-4 months of pregnancy and stop at prophase 1

Male germ line cells undergo meiosis beginning at puberty

Question 4

Cross over occurs during

Answer 4

Prophase I of meiosis

Question 5

Meiosis I separates ______

Answer 5

homologous chromosomes

Question 6

Meiosis II separates _______

Answer 6

sister chromatids

Question 7

Gametogenesis in males occurs in ______

Answer 7

Semininferous Tubules

Question 8

Process of spermatogenosis

Answer 8

Production of spermatagonium from primordial germ cells.
Spermatagonium undergo mitosis to form primary spermatocyte (2n)
Differentiation of 1dr spermatocyte to 2ndr spermatocyte indicates first meiotic division
Spermatids from 2ndr spermatocytes indicate 2nd meiosis
Nourished by sertoli cells.
Takes 65-75 days

Question 9

Process of oogenesis

Answer 9

Production of oogonium from primodrodial germ cell
Oogonium to primary oocyte arrested in prophase I until puberty
FSH releases primary oocyte to become secondary oocyte (1st meitotic division) and first polar body
Upon interaction with sperm, secondary oocyte undergoes 2ndr meitotic division to become ovum.