biol1201 mar4 notes

biol1201 mar4 notes - 3/4/08 The purpose of mitosis is to...

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3/4/08 The purpose of mitosis is to insure that the daughter cells have the identical genetic complement of the mother cell. True DNA is replicated in the S Phase. How many centromeres per chromosome? 1 How many centromeres per chromosome consisting of 2 sister chromatids? 1 Sister chromatids separate in the Anaphase. If the DNA content in G2 is 2X, what is the DNA content of each daughter cell at telophase? X If the DNA content in G1 is 2S, what is the DNA content of each of the daughter cells at telophase? 2X In mitosis when do homologous chromosome pairs separate? It does not happen In meiosis when do homologous chromosomes separate? Anaphase I At G2 the amount of DNA is 2X. At telophase II the amount of DNA in each of the daughter cells is .5X At G2 there are 40 chromatids. What is the diploid (2N) chromosome number? 20 At G2 there are 40 chromatids. At telophase II each daughter cell has 10 chromosomes. 1. Cell division for gamete formation a. Sexual reproduction i. Fusion of gametes from parents to form a zygote. ii. The advantage – there is greater diversity of offspring than asexual reproduction iii. Must preserve the genetic complement characteristic of the species 1. Must maintain the correct number of chromosomes iv. Humans start with 46 chromosomes in mitosis; they also end
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biol1201 mar4 notes - 3/4/08 The purpose of mitosis is to...

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