Brainscape's Knowledge GenomeTM

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


See full index

Genbio > Meiosis > Flashcards

Meiosis Flashcards

1
Q

Is a type of cell division in sex cells/germ cells (gametes)

Occurs only in germ cells in gonads
• testes Jovaries

Occurs in flowers
•ovary and anther

A

Meiosis

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

One copy of each chromosome

A

Haploid

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

Two copies of each chromosome

A

Diploid

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

Pair of chromosomes similar in shape, size, and types of genes.

One comes from the mother and the other from the father.

A

Homologous chromosomes

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

A special type of cell division where one cell can produce four genetically different cells with half the number of chromosomes. Meiosis is how gametes are made.

A

Meiosis

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

Meiosis (Reduction division)

A

Meiosis 1/Meiosis 2

Prophase 1/Prophase 2
Metaphase 1/ Metaphase 2
Anaphase 1/ Anaphase 2
Telophase 1/ Telophase 2

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

The longest phase.

This phase can be divided into 5 stages
a) Leptotene
b) Zygotene
c) Pachytene
d) Diplotene
e) Diakinesis

A

Prophase 1

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

Prophase begins Chromosomes start to condense

A

Leptotene

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

Synapsis begins Synaptonemal complex forms

A

Zygotene

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

Crossing over DNA exchanged by non-sister chromatids

A

Pachytene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Synapsis ends. Chiasma visible within bivalent

A

Diplotene

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

Prophase ends Nuclear membrane disintegrates

A

Diakinesis

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

may occur between non-sister chromatids at the chiasmata.

segments of non- sister chromatids break and reattach to the other chromatid

A

Crossing over

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

are the sites of crossing over

A

Chiasmata (chiasma)

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

The pairs of chromosomes line up on the equator

A

Metaphase 1

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

movement of chromosomes to both poles of a meiotic cell via spindle fibres This mechanism separates homologous chromosomes into two separate groups.

A

Anaphase 1

17
Q

Nuclear membranes form.

The cell separates into 2 cells.

A

Telophase 1 and cytokinesis

18
Q

Now the cells are haploid

The chromosomes do not decondense at the end of meiosis 1

A

Prophase 2

19
Q

the chromosomes align along the equatorial plate in both cells

A

Metaphase 2

20
Q

the chromosomes separate at the centromeres

The spindle fibers pull the separated chromosomes toward each pole of the

A

Anaphase 2

21
Q

the chromosomes are enclosed in nuclear membranes

A

Telophase 2

22
Q

Four haploid daughter cells and nucleolus reappears

A

Cytokinesis 2 in meiosis

23
Q

there are four haploid daughter cells that go on to develop into either sperm or egg cells.

A

Meiosis

24
Q

In males, meiosis results in 4 sperm cells

In females, meiosis results in 1 egg cell and three polar bodies, which are not used in reproduction

A

Gametes formation

25
Q

Begins with diploid cell

• Only produces gametes: genetically different haploid cells

• Has two cell division stages: meiosis 1 and meiosis 11

Meiosis produces two haploid cells each containing one chromosome from the homologous pairs

Meiosis Ilseparates sister chromatids to produce four haploid gametes

A

Meiosis

26
Q

pairing of homologous chromosomes

A

Synapsis

27
Q

4 sister chromatids of paired homologous chromosomes

A

Tetrad

28
Q

results when control of the cell cycle is lost, and cells divide uncontrollably

it is a result of unchecked cell division caused by a breakdown of mechanisms that regulate the cell cycle

A

Cancer

29
Q

is the development of cancer.

A

Carcinogenesis

30
Q

tumor cells grow only locally and cannot spread by invasion or metastasis

A

Benign (not cancer)

31
Q

cells invade neighboring tissues, enter blood vessels. and metastasize to different sites

A

Malignant(cancer)

Genbio (12 decks)

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