BIOLOGY 202L Lecture Notes - Lecture 5: Alpha Cell, Meiosis, Chromosome
21 Jan 2016
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Document Summary
At molecular level, many genes are synonymous throughout. Core of genetics: what happens to chromosomes during meiosis: fusion/mating = complication/hindrance, yeast is much easier to study for that reason ( ultimate genetic eukaryotes system to study) Yeast: 16 unique pairs of chromosomes (human = 23 pairs, typically diploid in nature (32 pairs), but often maintained in, 2 mating types for yeast cells haploid state at 16 pairs. Can only fuse one of each together (not a-a or alpha- alpha) to make diploid. **single centromere = single chromosome: x (with single centromere) contains 2 sister chromatids, centromeres divide 2 separate chromosomes are formed. Diagram: **look up allele vs loci*: 2 haploid cells (a and alpha) Difference between mating type = different position of a gene on a single chromosome (mating type locus) locus = position on a chromosome, often in reference to homologous chromosomes. Allele = actual genetic material: homologues contain the same set of loci but.
