MCDB Low Lecture #10

MCDB Low Lecture #10 - MCDB Low Lecture #10 Meiosis: The...

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MCDB Low Lecture #10 Meiosis: The basis of Mendelian Genetics Mitosis = Asexual Reproduction o Vegetative reproduction o Results in genetic constancy o Offspring = clones of parents o Variation by random mutation is the only way these organisms evolve o Rapid and efficient means of reproduction Plants have asexual production like a cactus Meiosis = Sexual Reproduction o Results in genetic diversity o Offspring not identical to parents or each other o 2 parents each contributes 1 gamete to each offspring Sexual reproduction requires large expenditure of energy o Males use energy for courtship or fight to have the right to mate o Detracts from other useful activates such as feeding and caring for existing offspring Requires that resources be used to maintain a large population of males that do not bear offspring. The genetic variation allows natural selection and evolution Meiosis and Sexual Reproduction Diploid (2n) - Cells of organisms that have a sexual life cycle have cells that have two complete sets of chromosomes, one from each parent. Haploid (1n)
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This note was uploaded on 01/19/2012 for the course MCDB 1a taught by Professor Feinstein during the Fall '08 term at UCSB.

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MCDB Low Lecture #10 - MCDB Low Lecture #10 Meiosis: The...

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