Meiosis Flashcards
1
Q
Define meiosis
A
- Reductive division resulting in haploid gametes
- gametes are genetically distinct
2
Q
Meiosis I
A
- parental cell undergoes DNA replication
- genetic recombination/crossing over occurs (prophase)
- independent assortment (2^n different types) - n=# chromosomes
3
Q
Meiosis II
A
- no DNA replication
- resembles mitosis
4
Q
What results from meiosis I?
A
2 cells, genetically different progeny cells
5
Q
What results from meiosis II?
A
4 haploid, genetically distinct progeny cells
6
Q
What is “crossing over” during DNA replication in Meiosis I?
A
Physical exchange of chromosome portions between paternal & maternally derived homologous chromosomal pair
7
Q
when does crossing over occur in Meiosis I?
A
prophase
