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mitosis and meiosis

cell division

DNA is wound around a nucleosome which is made of 8 histone proteins
during interphase chromosomes are called chromatin
somatic cells are ordinary diploid cells
to stain chromosomes use acridine orange
all an individuals chromosomes is called a karyogram
number of autosomes in humans 22 pairs in each diploid cell
in humans meiosis produces 23 chromosomes
in humans mitosis produces 46 chromosomes
functions of mitosis are reproduction, growth and tissue repair
prokaryotic mitosis is called Binary fission
if cytokinesis does not occur a coenocyte forms
Gastrulation a process in which an embryo develops into a cup shaped structure with a cavity( occurs in fruit fly larvae)
Gametogenesis formation of gametes
metamorphosis adult emerges from pupa
the stages of interphase are G1,G0,S and G2
during the G1 stage of interphase organelles are doubled
the G0 stage of interphase refers to permanently resting cells such as nerve or muscle
during the S stage of interphase the genome of the cell is replicated
during the G2 stage of interphase proteins needed in cell division are made
Centrosomes contain a centriole pair
kinetochore protein attaches to chromatids so as they can move easily
at the end of telophase a clevage furrow forms
during prophase 1 of meiosis crossing over occurs at chiasmata
crossing over leads to variation
in metaphase 1 of meiosis homologous chromosomes line up on the equator of the cell
in metaphase 2 of meiosis sister chromatids line up on the equator of the cell( same as mitosis)
Created by: MKHealy



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