Cell Division Flashcards
1
Q
What happens during prophase 1 in meiosis?
A
- Chromatin condenses
- Nuclear envelope breaks down
- Spindle forms
- Chromosomes go to homologous pairs
- Crossing over occurs with alleles
2
Q
What happens during Metaphase 1 during meiosis
A
- Spindle attaches to centromeres
- Homologous pairs align along equator
- Independent assortment arranges the pairs randomly
3
Q
What happens during Anaphase 1 in meiosis
A
- Homologous pairs are pulled apart to opposite poles
- Centromeres are not divided
4
Q
What happens during Telophase 1 during meiosis?
A
- Two nuclear envelopes form around each set of chromosomes
- Cytokinesis occurs
5
Q
What happens during prophase 2 in meiosis 2?
A
- Chromosomes condense
- Nuclear envelope breaks down
- Spindle forms
6
Q
What happens during Metaphase 2 in meiosis 2?
A
- Spindle attaches to centromere
- Chromosomes align cell equator
- Independent assortment occurs
7
Q
What happens during anaphase 2 in meiosis 2?
A
- Centromeres divide
- Chromatids pulled to opposite poles by spindle fibres
8
Q
What happens during Telophase 2 in meiosis 2?
A
- Nuclear envelope forms around the four nuclei
- Cytokinesis occurs
- four haploid gametes
9
Q
What happens during prophase in mitosis?
A
- Chromatin condenses into chromosomes
- Nuclear envelope breaks down
- Centrioles move to opposite poles
- Tubulin threads form spindle
10
Q
What happens during metaphase in mitosis?
A
- Spindle fibres attach to the centromeres of the chromatids
- Chromatid pairs line up along equator
11
Q
What happens during Anaphase in mitosis?
A
- Centromeres split
- Motor proteins pull sister chromatids along spindle fibres to opposite poles
12
Q
What happens during telophase in mitosis?
A
- Chromosomes uncoil
- Nuclear envelope forms around each set of chromosomes
13
Q
What happens during cytokinesis in mitosis?
A
- animal cells: membrane folds inwards forming cleavage furrow
- plant cells: end plate forms and new plasma membrane and cell wall formed
