BIO 1130 Chapter Notes - Chapter 9: Microtubule, Kinetochore, Prometaphase
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BIO 1130 Full Course Notes
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Generation of genetic variability by meiosis is a prime evolutionary advantage of sexual reproduction. Some offsprings having combinations of alleles, which will be successful in surviving and reproducing in changing environments. 2- generate repaired chromosomes to be passed on to the next generations. No 2 humans,except twins,look alike or have identical biochemical and physiological characteristics. During meiosis and fertilization genetic variability arises from 4 sources. 2- the differing combination of maternal and paternal chromosomes separated to. 3- the differing combination of recombinant chromatids segregated to the poles be poles during anaphase 1 during anaphase 2. 4-the particular sets of male and female gametes that unite in fertilization. The 4 sources work together to produce variability so that no 2 products of meiosis produced and no 2 zygotes produced will have the same genetic makeup. Is the key genetic event in prophase 1. [as they pair they are held together by a protein framework called the.