Practice Test - Meiosis

During spermatogenesis, a spermatogonium divides by mitosis to produce: -two primary spermatocytes. -two spermatids. -a spermatogonium and a primary spermatocyte. -four spermatids.

a spermatogonium and a primary spermatocyte.

Germ-line cells are haploid but gametes are diploid. -True -False

false

The second meiotic division (meiosis II) of spermatogenesis results in the formation of secondary spermatocytes. -True -False

false

Describe the fate of each spermatid. -It differentiates into a sperm cell. -It divides by meiosis to produce two sperm cells. -It divides by mitosis to produce four sperm cells. -It divides by mitosis to produce two sperm cells.

it differentiates into a sperm cell

Name the first haploid cell (with 23 chromosomes) produced during spermatogenesis. -spermatogonium -secondary spermatocyte -spermatid -primary spermatocyte

secondary spermatocyte

Spermatogenesis occurs in the: -seminiferous tubules. -ductus deferens. -epididymis. -prostate gland.

seminiferous tubules.

List the correct order of cell stages in spermatogenesis. -primary spermatocyte → secondary spermatocyte → spermatogonium -spermatogonium → primary spermatocyte → secondary spermatocyte -primary spermatocyte → spermatogonium → secondary spermatocyte -spermatogonium → secondary spermatocyte → primary spermatocyte

spermatogonium → primary spermatocyte → secondary spermatocyte

The chromosome number is reduced during the first meiotic division (meiosis I). -True -False

true

Place the events occurring during oogenesis in order.

1) primary oocyte 2) first meiotic division 3) secondary oocyte 4) fertilization 5) second meiotic division 6) zygote

Place the events occurring during spermatogenesis in order.

1) primary spermatocyte 2) first meiotic division 3) secondary spermatocyte 4) second meiotic division 5) spermatids 6) sperm cells

DIFFERENCES - 1) Results in 4 viable cells. 2) Undergo meiosis. 3) May or may not finish the full process. 4) Results in hundreds of gametes on a continual basis. 5) After the first meiotic division, the gamete has 23 chromosomes

1) spermatogenesis 2) both 3) oogenesis 4) spermatogenesis 5) Both

Describe the chromosome number before and after meiosis II. -2N → 2N -4N → 2N -1N → 1N -2N → 1N

1N→1N

Describe the chromosome number before and after the first meiotic division (meiosis I). -4N → 2N -1N → 1N -2N → 2N -2N → 1N

2N→1N