Meiosis Flashcards
If a phosphate group is being moved around the cell where is it going
to an ATP or ADP
Prophase 1(5)
-90% of the cell cycle
-5 stages
-Chromosomes find their synaptic pairs
-synaptic pairs line up together
-crossing over/recombination
-sister chromatids condense into chromosomes
Prometaphase 1
nuclear envelope breaks down
kinetochore attaches to the spindle
metaphase 1 and anaphase 1
tetrads align along metaphase plate
homologs separate to poles
nondisjunction may happen
synaptic pairs
pairs that are the same one from mom and one from dad
tetrads
fully paired homologs
telophase 1 and interkinesis
chromosomes don’t change
spindle disassembles
prophase 2, prometaphase 2, metaphase 2
-chromosomes condense
-spindle forms
-nuclear envelope breaks down
-kinetochore forms
-chromosomes align on metaphase plate
anaphase 2 and telophase 2
-spindle separates from chromatids
-spindle disassembles
-nuclear envelope forms
nondisjunction
-when something goes wrong
-1 chromosomes doesn’t let go and stays as two chromatids
-part of a chromosome breaks off leaving them uneven
synaptonemal complex
made of multiproteins
parental type chromatid
the one that turns out identical to the parent
incompetent type chromatid
the one that isn’t identical to the parent
4 characteristics of homologous chormosomes
-not genetically identical
-same shape
-same size
-carry the same sequence of genes
What is separated during anaphase two
Sister chromatids
