meiosis Flashcards
1
Q
what are homologous chromosomes?
A
the have the same genes but different alleles(variants)
they pair to form bi valents
2
Q
how many times does meiosis happen
A
twice
3
Q
what happens during prophase 1
A
the nuclear envelope dissolves
the chromosomes condense and super coil
the bivalents cross over
the centrioles go to the equator poles of the cell and start to form spindle fibres
4
Q
metaphase 1
A
the crossed over bivalents are attached to the spindle fibres by their centromere
5
Q
anaphase 1
A
the chromosomes are pulled apart
the crossed over area are seperated
6
Q
telophase 1
A
the cell forms two nuclear envelopes around each set of chromosomes and cell divides by cytokinesis
7
Q
propahse 2
A
metaphase,anaphase
telophase all happen again
8
Q
what is the product?
A
there are four new haploid nuclei
