Module 5 - Meiosis Flashcards
1
Q
- Process of cell division that happens to germ cells wherein gametes are formed and the number of chromosomes is halved.
- Single germ cell divides into four unique daughter cells.
A
Meiosis
2
Q
Types of Cells that create gametes
A
Germ Cells
3
Q
-Exists in homologous pairs that carry our genetic information.
A
Chromosome
- Homologous pair before replication ( | | ) [Chromatid]
- Homologous pair after replication ( X X ) [Sister Chromatid]
4
Q
- One copy of each chromosome
- designated as “n”, the number of chromosome in one ‘set’.
- Gamete Cells
A
Haploid
5
Q
- Two sets of chromosomes (two of each)
- designated as “2n”
- Somatic Cells
A
Diploid
6
Q
2 Stages of Meiosis
A
- Meiosis I (Reduction Division)
- Meiosis II (Mitotic Division)
7
Q
- Still happens in Meiosis I
- Chromosome replicates
A
Interphase
Rarely Happens in Meiosis II; No more DNA Replication
8
Q
4 Phases in Meiosis I
A
Prophase I
Metaphase I
Anaphase I
Telophase I
9
Q
Prophase I
A
- Synapsis to Tetrad
- Crossing over
- Chiasmata
- Forming of aster fibers
- Centriole form spindle fibers
10
Q
-Occurs when 2 of homologous chromosomes come together to form a Tetrad ( XX )
A
Synapsis
11
Q
-2 Chromosomes or 4 Chromatids
A
Tetrad
12
Q
- Non-sister chromatids at the chiasmata breaks segments and reattaches to the other non-sister chromatid.
- Exchange of particular genetic trait from one non-sister chromatid to another.
A
Crossing Over
13
Q
Site of Crossing Over
A
Chiasmata (Chiasma sing.)
14
Q
- Metaphase plate is created
- Independent assortment (2^n)
A
Metaphase I
15
Q
Orientation of Homologous pair towards the poles is randomized during Metaphase I
A
Independent assortment
