mitosis & meiosis

fibiyeya's version from 2015-11-14 04:08


Question Answer
mitosis prophase(preparation) chromosomes condense, nuclear envelope degrades, mitotic spindles assemble
mitosis metaphase(middle) chromosomes line up along the middle
mitosis anaphase(apart) sister chromatids are pulled apart to opposite poles
mitosis telophasechromosomes decondense, nuclear envelope reforms, mitotic spindles degrade
what is the product of mitosis?2 diploid daughters (46 chromosomes) that are identical to mother cell
meiosis prophase I(preparation) chrosomes condense, synapsis, crossing over, nuclear envelope degrades, centriole pairs move toward opposite poles
what is synapsis & when does it occur?homologous chromosomes (each with 2 sister chromatids) become associated during meiosis prophase I
what is a tetrad & when does it form?2 homologous chromosomes made of 2 sister chromatids each, forms during meiosis prophase I
meiosis metaphase I(middle) tetrads align along equator, with the patermal & maternal homologues facing different poles - randomly
meiosis anaphase I(apart) tetrads pulled apart, with one homologue (2 sister chromatids) for each chromosome pulled to each end
meiosis telophase Inuclear envelope reforms
what is the product of meiosis I?2 haploid daughters (23 chromosomes), 2 sister chromatids per chromosome (46 chromatids)
meiosis prophase IInuclear envelope degrades, new spindles form
meiosis metaphase IIspindle fibers bind to both sides of centromeres
meiosis anaphase IIsister chromatids pulled apart to opposite poles
meiosis telophase IInuclear envelope reforms
what is the product of meisosis II?4 haploid daughters (23 chromosomes, and 23 chromatids), not identical to mother cell
centromere?joins chromatids
kinetochore?protein at centromere, where spindle fibers attach
chromatids?duplicated copies of the same chromosome