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Mitosis and meiosis

the process and stuff

QuestionAnswer
gametes a haploid reproductive cell that unites with another haploid reproductive cell to form a zygote
haploid half of chromosomes
diploid contains both sets of chromosomes
crossing over like chromosomes exchange portions of their chromatids during meiosis
genotype genetic makeup of an organism
phenotype physical appearance of genetic makeup
heterozygous different
homozygous same
how many cells and what type of cells does meiosis produce? 4 haploid cells
what is the function of meiosis? reduce number of chromosomes by half
where does meiosis happen gametes
what is produced in meiosis? two nuclear divisions produce four haploid cells
What is the first of two divisions? meiosis 1
what occurs in this division? reduction. goes from 2n to 1n
where do homologues chromosomes pair up? prophase 1
what is tetrad composed of? two chromatids from each chromosomes
where and what happens in crossing over? in prophase 1 , chromatids break apart and are reattached to different homologous chromosomes
what is synapsis the procedure where they pair up
where do the tetrads line up? along equator of nuclei in metaphase 1
where is dna and chromosomes replicated? interphase
where do the spindle fibers attach to centomere? in metaphase 1
Anaphase 1 TETRADS seperate and are drawn to opposite poles by spindle fibers as they shorten. The centromere remains intact.
telophase 1 Cell divides but no nuclear membrane does not form and chromosomes do not dissapear
Meiosis 2 a mitotic division of each of the haploid cells produced in meiosis 1
prophase 2 spindle fibers form
metaphase 2 chromosomes align on metaphase plate
anaphase 2 the centromere splits and spindle fibers shorten drawing chromosomes to each pole
telophase 2 cytokenisis and nuclear membrane formation
Created by: bets98
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