Complex Meiosis stuff Flashcards
synonym for fertilisation
syngamy
when does meiosis begin
occurs during gamete formation
what is your father and mother
mother = maternal homologue
father = paternal homologue
what is synapsis
during early prophase I, homologous chromosomes find each other and become closely associated, they form a synaptonemal complex between homologues (not sister chromatids)
what is a tetrad/ bivalent
the paired homologues each comprising of two sister chromatids
what is the chiastma
the site of recombination or crossing over
why is the first phase of meiosis called reductional division but the other phase isnt
frist phase results in daughter cellsthat contain one homologue from each chromosome pair. the second mitotic division does not further reduce the number of chromosomes; it will merely separate the sister chromatids for each homologue
meiosis involves the successive divisions with no replication of genetic material between then
what are recombination nodules
made during prophase 1, thought to contain the enzymatic machinery necessary to break and rejoin chromatids of homologues chromosomes.
why does the aligment of homologues happen
the kinetochores of sister chromatids for each homologues act as a unit to capture polar microtubules
monopolar attachment
each homologue is attached to one pole instead of having its sister chromatids attached to the opposite polar in the bipolar fashion of mitosis
