BIOL 1201 Lecture : Pre Lecture Notes

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15 Mar 2019
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Cell reproduction: division of the nucleus, karyokinesis (mitosis, meiosis, division of the cytoplasm, cytokinesis, division of the nucleus and cytoplasm do not always have to occur together, they occur threw completely different mechanisms. Mitosis: produces identical daughter cells/nuclei, daughter cells/nuclei are identical to each other, prophase. In humans, this number= 23: ploidy refers to- the number of sets of chromosomes, haploid= 1 set (1n, diploid= 2 sets (2n, triploid= 3 sets (3n, fairly rare, tetraploid= 4 sets (4n) Homologous chromosomes: same length, same centromere position, same banding pattern, *same genes, but not necessarily the same form of the gene. Information (dna sequence) leading to a particular characteristic: one form of a gene, different forms of a gene. Linked genes are fundamentally different from unlinked genes. In terms of how they behave and how they behave in meiosis: normally in meiosis, alleles for different genes assort independently from one another.

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