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Science > Spermatogenesis and Oogenesis > Flashcards

Spermatogenesis and Oogenesis Flashcards

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Biology 101 flashcards
1
Q

The formation of sperm cells that occurs in the testes where it is produced.

A

Spermatogenesis

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2
Q

Where does spermatogenesis occur?

A

Spermatogenesis occurs in the testes in coiled tubes.

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3
Q

Spermatogenesis occurs in the testes in coiled tubes called _.

A

seminiferous tubules

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4
Q

In humans, how long does spermatogenesis take?

A

64-75 days

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5
Q

Spermatogenesis begins when these found near the outer wall of the tubules, divide constantly by mitosis…

A

spermatogonia

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5
Q

Spermatogonia are also called?

A

diploid cells

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6
Q

Spermatogenesis begins when spermatogonia, the diploid cells, found near the outer wall of the tubules, divide constantly by _, further developing…

A

mitosis

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7
Q

Spermatogenesis begins when spermatogonia, the diploid cells, found near the outer wall of the tubules, divide constantly by mitosis, further developing into?

A

primary spermatocytes

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8
Q

These are discharged along with urine. They form on the onset of puberty, then testes start to produce _.

A

Sperm cells

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9
Q

The life span of sperm cells.

A

Every after 3 days or 72 hours.

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10
Q

This is hygienic. It serves to make males’ genitals clean. It is a biological process. If this is not done, it will form a pouch that will lead to diseases like UTI and many more; and it would be dirty, stinky since urine is a body waste.

A

Circumcision

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11
Q

How many chromosomes does diploid have?

A

46 chromosomes

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12
Q

How many chromosomes does haploid have?

A

23 chromosomes

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13
Q

Cell division. The process where our cells are divided.

A

Mitosis

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14
Q

The four stages of Mitosis.

A

P - Prophase
M - Metaphase
A - Anaphase
T - Telophase

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15
Q

What does spermatogenesis produce?

A

Spermatogonia

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16
Q

Are spermatogonia matured?

A

No.

17
Q

After spermatogenesis produced spermatogonia, it will develop into?

A

Primary Spermatocytes

18
Q

Primary Spermatocytes undergo Meiosis I, then further develops into

A

Secondary Spermatocytes

19
Q

SPERMATOGENESIS → SPERMATOGONIA → PRIMARY SPERMATOCYTES → SECONDARY SPERMATOCYTES → _ → _

A

SPERMATIDS; SPERMATOGONIUM

20
Q

The production of gametes/sex cells.

A

Meiosis

21
Q

The common body cells between male and female that undergo mitosis.

A

Somatic Body Cells

22
Q

Somatic Body Cells has 46 chromosomes, which is why it is also called _.

A

diploid cells

23
Q

2 Categories of Meiosis.

A

Meiosis I and Meiosis II

24
Q

The stage where sperm cells and egg cells become 23 cells to be ready for their next phases.

A

Fertilization

25
Q

The primary spermatocytes then undergo meiosis I, each producing _, with haploid number of chromosomes.

A

two secondary spermatocytes

26
Q

The secondary spermatocytes undergo meiosis II and produce daughter cells, which are also called? They become mature and flagellated to form sperm cells.

A

spermatids

27
Q

How long does the maturation process of spermatids usually take?

A

9 to 10 weeks

28
Q

Where are sperm cells stored until ejaculation?

A

Epididymis

29
Q

The development of an ovum that occurs in the ovary.

A

Oogenesis

30
Q

The ovary at birth contains all the _ (from which ova are formed) a female will ever have.

A

follicles

31
Q

What reproductive organ at birth contains all the follicles (from which ova are formed) a female will ever have?

A

ovary

32
Q

The diploid cells in the ovaries or oogonia undergo _ producing daughter cells.

A

Mitosis

33
Q

The diploid cells in the ovaries or oogonia undergo mitosis producing daughter cells called _, each residing in a follicle.

A

Primary Oocytes

34
Q

How many primary oocytes are produced when the female baby is born?

A

Around 2 million primary oocytes

35
Q

How many primary oocytes remain by the time a female reaches seven years old, since most of primary oocytes are reabsorbed in the body?

A

300 000

36
Q

The primary oocytes remain dormant for a time in the _ until it can be triggered hormonally to develop further.

A

Prophase of Meiosis I

37
Q

About every 28 days after puberty, _ stimulates one of the dormant follicles to develop and the primary oocyte completes meiosis I.

A

FSH from anterior pituitary gland

38
Q

The FSH from anterior pituitary gland stimulating one of the dormant follicles results in daughter cells with?

A
  • unequal division of cytoplasm
  • a single secondary oocyte receiving almost all of the cytoplasmic content
  • a smaller daughter cell called first polar body with almost no cytoplasm
39
Q

A smaller daughter cell is called?

A

first polar body

40
Q

This is released by the ovary during ovulation. This is one of the events in the menstrual cycle.

A

Secondary Oocyte

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