Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology > Meiosis & Cell Theory > Flashcards

Meiosis & Cell Theory Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

What are nucleosomes composed of?

A

Histone and DNA spooled together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the four components of the nucleus?

A
  1. Nuclear envelope
  2. Nucleoplasm
  3. Chromosomes
  4. Chromatin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the nucleoplasm?

A

Fluid interior portion of the nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What do cells do before entering nuclear division?

A

Cells duplicate their chromosomes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How are sister chromatids formed?

A

By cells duplicating their chromosomes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the 3 points to Cell Theory?

A
  1. Every organism is composed of one or more cells
  2. The cell is the smallest unit having the properties of life
  3. The continuity of life arises directly from the growth & division of single cells
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Meiosis:

A

Occurs in single-celled & multi-celled eukaryotes in order to form gametes (egg.sperm) for sexual reproduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does Meiosis occur in?

A

Single-celled and multi-celled eukaryotes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the stages of Meiosis?

A
  1. Prophase I
  2. Metaphase I
  3. Anaphase I
  4. Telophase I
  5. Prophase II
  6. Metaphase II
  7. Anaphase II
  8. Telophase II
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What occurs during Prophase I? (4 points)

A
  • Chromosomes begin to condense
  • Pairs of homologous chromosomes form
  • Crossing over may occur
  • Spindle fibers may start to attach to the centromeres
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

During what phase might crossing over occur?

A

Prophase I

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What occurs during Metaphase I?

A
  • Spindles becomes fully formed

- The homologues line up midway between the poles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What occurs during Anaphase I?

A
  • Homologous pairs are separated & move to opposite poles
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What occurs during Telophase I?

A
  • Cytoplasm divides & 2 new haploid cells are formed

* DNA is still duplicated, however

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

During what phase are 2 new haploid cells formed?

A

Telophase I

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

During what phase do spindles become fully formed?

A

Metaphase I

17
Q

During what phase do homologues line up midway between poles

A

Metaphase I

18
Q

What occurs during Prophase II?

A
  • Centrioles separate & spindle fibers attach to the centrioles
  • The chromosomes begin to move to the equator of the cell
19
Q

What occurs during Metaphase II?

A
  • Chromosomes line up on the equator
20
Q

What occurs during Anaphase II?

A
  • Sister chromatids are separated & move to opposite poles
21
Q

What occurs during Telophase II?

A
  • 4 daughter nuclei are now formed, each with a haploid chromosome number (n)

Biology (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions