killian-2_Mitosis_and_Meiosis-243943111

killian-2_Mitosis_and_Meiosis-243943111 - BIO231 Genetics...

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4/2/11 BIO231 – Genetics Lecture 2 Mitosis and Meiosis TCNJ “We are survival machines - robot vehicles blindly programmed to preserve the selfish molecules known as genes. This is a truth which still fills me with astonishment.” -Richard Dawkins The Selfish Gene (1976) Preface
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4/2/11 The Cell Cycle G1 and G2 are growth phases DNA is replicated during S phase Cell division occurs at M phase Cells that are not Klug, 9th ed.
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Click to edit Master subtitle style 4/2/11 Chromosomes Physical structures composed of DNA, RNA, and proteins (in Eukaryotes). Only visible as discrete units when condensed for mitosis or meiosis. Scanning electron microscope image of 2 different chromosomes Klug, 9th
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Click to edit Master subtitle style 4/2/11 Chromosomes Since chromosomes are only visible when condensed for mitosis or meiosis, they are generally depicted as a chromosome with a sister chromatid. DNA replication has already occurred in cells with condensed chromosomes. Klug, 9th
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4/2/11 Chromosome Morphology The centromere is the region of the chromosome where Klug, 9th ed.
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4/2/11 Ploidy, “ n Russell, igenetics , 2nd Haploid ( n ) Diploid (2 n )
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Ploidy, “ n Ploidy = The number of complete sets of chromosomes in a cell. Humans, and most other animals, are diploid (or 2 n ) : each somatic cell bears two sets of chromosomes. One set is inherited from each parent ( biparental inheritance ). Some amphibians, reptiles, and plants are polyploid , having more than 2 complete sets of chromosomes (ex: tetraploid 4 n , octaploid 8 n ). Sperm and egg are
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This note was uploaded on 04/02/2011 for the course GENETICS 8383 taught by Professor Love during the Spring '11 term at Rutgers.

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killian-2_Mitosis_and_Meiosis-243943111 - BIO231 Genetics...

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