Chapter 46: Animal Reproduction Flashcards Preview

Bio 93: Exam 3 > Chapter 46: Animal Reproduction > Flashcards

Flashcards in Chapter 46: Animal Reproduction Deck (15):
1

What is spermatogenesis?

Meiosis for sperm

2

What are spermatids?

Spermatogonium that go to the center when they've matured

3

What part of the sperm allows it to break through the egg's membrane?

Acrosome

4

What powers the mitochondria to power the swimming of the sperm tail?

ATP

5

What is needed in the midpiece that allows the tail to move?

Microtubules with motor proteins

6

What would most likely happen if a sperm had a mutation in the mid piece?

Have trouble with flagellar movement

7

What are follicles?

Sacs that surround the egg while it's inside the ovaries

8

What happens when the follicle exits the ovaries?

It does Oogenesis

9

What is Oogenesis?

While inside the ovaries:
- Mitosis (she is still an embryo)
- Prophase of Meiosis I
^follicle growing and growing
- Completion of Meiosis I (puberty starts)
^follicle matured

Exited the ovaries:
- Begin Meiosis II
^follicle ruptures and egg exits
- Completion of Meiosis II
^egg is fertilized

10

What is the end product of Oogenesis?

Two daughter cells, one huge and one puny (cannot be fertilized)

11

True or false:

Oogenesis begins at the onset of sexual maturity, whereas spermatogenesis begins during embryonic development.

False

12

True or false:

Cytokinesis is unequal in oogenesis, whereas it is equal in spermatogenesis.

True

13

True or false:

Oogenesis ends a menopause, whereas spermatogenesis is finished before birth.

False

14

True or false:

Oogenesis produces four functional haploid cells, whereas spermatogenesis produces only one functional spermatozoa.

False

Oogenesis: 1
Spermatogenesis: 4

15

List and describe the 5 steps of fertilization

1. Ovulation:
- mature egg is released from ovary
2. Fertilization:
- sperm swim up the Fallopian tube and fertilize the egg
3. Cleavage:
- Mitosis occurs
4. Cleavage continues:
- Egg looks like a bag of grapes (more mitosis)
5. Implantation:
- Fluid filled cavity inside the egg adheres to the wall of the uterus (pregnant)