BIOL 1000 Lecture Notes - Lecture 34: Sister Chromatids, Metaphase, Meiosis

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Lomoar cpsd| 987298: metaphase i tetrads are aligned at metaphase plate (not individual chromosomes) Anaphase i pairs of homologous chromosomes separate, but sister chromatids of each chromosome stay together. At end of meiosis i, 2 haploid cells exists, but each chromosome still has 2 sister chromatids. Meiosis ii is identical to mitosis it separates chromatids . Difference***in meiosis each daughter cell only contains a haploid set of chromosomes. Independent orientation of chromosomes in meiosis and random fertilization lead to varied offspring. Offspring that result from sexual reproduction are highly varied . Arrangement of homologous chromosomes at metaphase of meiosis i affects the resulting gametes . Whether the paternal or maternal chromosome in a homologous pair is closer to a given pole is a 50% chance. For any species, the total number of combinations of chromosomes that meiosis can package into gametes is 2n (n is the haploid number) .

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