These diploids will mate with cells of the opposite

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Unformatted text preview: r MAT / MAT diploid cells. These diploids will mate with cells of the opposite mating type, either haploids or diploids. The ability to mate is thus determined by the genetic configuration at the MAT locus and is not related to ploidy per se. The Nuclear Genome of Yeast Haploid S. cerevisiae has 16 linear chromosomes in the nucleus and a total genome size of about 12 Mb. A comparison of yeast and human chromosomes and genomes is given in Table A.1. Each yeast chromosome is constructed Nitrogen starvation a/α Mating: zygote formed TABLE A.1 Comparison of Yeast and Human Genomes Yeast Vegetative life cycle (diploid) Budding Figure A.2 Life cycle of yeast. Yeast can grow vegetatively as either haploid or diploid cells. The transition from haploid to diploid occurs via mating, and the transition from diploid to haploid occurs via meiosis during sporulation. Human Genome size 12 Mb 3200 Mb Number of 16 chromosomes chromosomes 22 pairs of autosomes 1 pair of sex chromosomes Number of genes 6000 20,000–30,000 Ploidy Haploid or diploid Diploid har06584_refA_001-020 11/4/06 10:09 AM Pa...
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