Biology 1201A Lecture Notes - Lecture 3: Allele, G1 Phase, Cell Plate
21 Nov 2016
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The entire mechanism of prokaryotic cell division, called binary fission, that is, splitting or dividing into two parts, can be thought of in three periods. As long as eukaryotes require their daughter cells to be genetic copies of the parental cell, mitosis serves very well to divide the replicated dna equally and precisely. This is the result of three elegantly interrelated systems: An elaborate master program of molecular checks and balances ensures an orderly and timely progression through the cell cycle. Within the overall regulation of the cell cycle, a process of dna synthesis replicates each dna chromosome into two copies with almost perfect fidelity (see section 12. 3). A stru(cid:272)tural a(cid:374)d (cid:373)e(cid:272)ha(cid:374)i(cid:272)al (cid:449)e(cid:271) of i(cid:374)ter(cid:449)o(cid:448)e(cid:374) (cid:862)(cid:272)a(cid:271)les(cid:863) a(cid:374)d (cid:862)(cid:373)otors(cid:863) of the cytoskeleton separates the replicated dna molecules precisely into the daughter cells. A cell division process called meiosis produces some cells that are genetically different from the parent cells.
