Brainscape's Knowledge GenomeTM

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


See full index

BB1705 Biology of the Cell > Cell division > Flashcards

Cell division Flashcards

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

What are the two classes of cell division?

A

Meiosis and mitosis

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

What are the products of meiosis?

A

Gametes (haploid cells)

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

What are the products of mitosis?

A

Two diploid daughter cells that are identical to the mother cell

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

What are sister chromatids bound together by?

A

Cohesin complexes bind the two sister chromatids tightly together along their entire length

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

In what stage of meiosis does **pairing **occur?

A

Prophase I

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

How does pairing occur between homologs?

A

Through interactions between complementary DNA sequences called pairing sites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a bivalent?

A

A four-chromatid structure formed during prophase I

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

What is synapisis?

A

A process in which the axial core of a homolog becomes tightly linked to the axial core of its partner by a closely packed array of transverse filaments

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

What complex is formed as a result of synapsis?

A

Synaptonemal complex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the stages in prophase I?

A
  1. leptotene
  2. zygotene
  3. pachytene
  4. diplotene
  5. diakinesis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the stages in mitosis? Give an outline of what happens in each.

A
  1. interphase
  2. prophase
  3. metaphase
  4. anaphase
  5. telophase
  6. cytokinesis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What happens during zygotene during prophase I of meiosis?

A

Maternal and paternal homologs pair together to form bivalents

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

What happens during pachytene during prophase I of meiosis?

A

Chromosomes thicken and “crossing over” occurs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What happens during diplotene during prophase I of meiosis?

A

Homologs seperate, but are held together by chiasmata

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  • Lazy
  • Zebras
  • Party
  • Down
  • Ditches
A
  1. Leptotene
  2. Zygotene
  3. Pachytene
  4. Diplotene
  5. Diakinesis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is kinetochore synonymous with?

A

Centromere

17
Q

What is nondisjunction?

A
  • the failure of paired chromosomes to seperate during meiosis I
  • failure of sister chromatids to seperate dring meiosis II
18
Q

Define euploid

A

A cell with 46 chromosomes

19
Q

Define aneuploidy

A

A non-euploid cell, a cell that contains an abnormal number of chromosomes

20
Q

What is an example of trisomy?

A
  • Trisomy 21/ Down syndrome
  • Klinefelter syndrome (XXY)
21
Q

What is an example of monosomy?

A

Turner syndrome (XO)

22
Q

What is “crossing over”?

A

A process where DNA segments of homologous chromosomes are exchanged during prophase I (pachytene)

23
Q

What protein initiates crossing over? How does it do this?

A

*Spo11, *it creates a double-stranded break in the DNA of the chromatid

24
Q

What multienzyme catalyses homologous recombination in crossing over?

A

Recombination complex

BB1705 Biology of the Cell (11 decks)

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