Meiosis Flashcards
What is the chromatin network
Single stranded chromosomes in a network
What is a homologous pair
A bivalent
1 maternal 1 paternal
What connects chromatids
A centromere
What is meiosis
Cell production that takes place in the reproductive organs
What is early prophase 1
Chromosomes become short and fat
What is late prophase 1
Synapsid to move bivalents lie next to centrioles to opp ends
Spindle fibres
Cell mem breaks down
Crossing over takes place
Metaphase 1
Bivalents move to equator
Centromeres attach to spindle threads
Anaphase 1
Bivalents separate
Independent assortment
Telophase 1
From 2 haploid cells
Late prophase 2
Two chromatids joined by a centromere
Divides
Metaphase 2
Chromosome to centre and link to threads
Anaphase 2
Centromeres split
Spindles pull chromatids to opp ends
Telophase 2
New bucket membranes form around new set of chromosomes
4
What is chromosome non disjunction
Abnormal meiosis where chromosomes fail to separate correctly
What is a karyotype
A computerised diagram of all the chromosomes in a cell during interphase
