2. Meiosis Flashcards
1
Q
What is meiosis?
A
production of haploid cells from a diploid cell that reduces the number of copies of each chromosome from two to one
2
Q
What are the two main similiarities between meiosis and mitosis?
A
- both are preceded by one round of genome replication
- different phases are referred to by the same names
3
Q
What are the two main differences between meiosis and mitosis?
A
- mitosis is replication of genome followed by one round of division while meiosis is two rounds of division
- in meiosis, recombination occurs between homologous chromosomes
4
Q
What occurs during prophase I?
A
synapsis
5
Q
What is synapsis?
A
homologous chromosomes pair together
6
Q
What regulates synapsis?
A
synaptonemal complex (SC)
7
Q
What occurs during metaphase I?
A
tetrads align along the metaphase plate occurs
8
Q
What occurs during anaphase I?
A
homologous chromosomes separate
9
Q
What occurs during telophase I?
A
cell divides into two
10
Q
What is nondisjunction?
A
failure of homologous chromosomes or sister chromatids to separate correctly during meiosis
