Meiosis Flashcards
1
Q
Meiosis Def
A
One diploid germ cell divides in order to create either 1 or 4 haploid cells (23 chromosomes)
2
Q
Prophase I
A
- Homologous Chromosomes pair
- Synapsis
- Tetrad
- Synaptonemal Complex
- Crossing over!!
3
Q
By the end of prophase I
A
- Spindle has formed
- Nuclear Membrane has vesicularized
- Nucleoli gone
- Homologous chromosomes are attached by their kinetochores to spindle fibers from opposite poles
- Homologous chromosomes are held together only at chiasmata
4
Q
Metaphase I
A
- Tetrad to middle plate
- Random orientation leads to genetic variability !!!
5
Q
Anaphase I
A
- Homologous chromosomes separated
- Independent Assortment!!!
6
Q
Telophase I
A
- Spindle fibers disintegrate
- Chromosomes partially decondense
- Nuclear membrane may form
- Cytokinesis
7
Q
Interkinesis
A
- Between meiosis I and meiosis II
- NO S PHASE
- Varies in length, usually brief
8
Q
Prophase II
A
Chromatin did not completely decondense after meiosis I
9
Q
Metaphase II
A
Sister chromatids are connected by their kinetochores to spindle fibers from opposite poles
