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Chapter.8

Mitosis & Meiosis

QuestionAnswer
mitosis Produces two daughter cells that are identical to the parent cell by cell division
prophase chromosomes coil , nuclear membrane disintegrates, spindle fibers form , centrioles move to poles
metaphase chromosomes align on equator at cetromere attach to spindle fibers
anaphase chromotids separate , attached to spindle fibers. move to the opposite poles
telophase nuclear membrane reforms, chromosomes unwind, cytokinesis begins , furrow between two forming cells,spindle fibers disappear
formed in plants but not in animals? Cell plate that will form the cell wall in plants
diploid 46 chromosomes in humans(full set is 2) somatic cells 2 sex cells
haploid 23 chromosomes in humans(one set) form gametesex sperm and egg
meiosis Process in which gametes are produced with half the number of chromosomes as the parent cell Meiosis I and Meiosis II
synapsis two homologous pair of chromosomes ( each consisting of two chromotids draw together)
tetrad two pairs of homologous chromosomes (composed of 2 sister chromotids) draw together forming a tetrad
crossing over breaking off and sharing of parts of chromosomes between two non-sister chromatids
why is meiosis divided into I By dividing twice one cell will produce 4 haploid daughter cells.
How many sex chromosomes in human 1 pair XX (female) XY (male)
how many autosomes in humans 44 (22 pairs)
Created by: RisaS
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