Biology 1001A Lecture Notes - Lecture 5: 23Andme, Chromatin, Eukaryote
19 Sep 2013
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In multiple choice questions, identify the non-nuclear genomes in typical plant and animal cells. Plant cell has dna in mitochondria and chloroplasts. Plant cell has 3 diff genomes: in nucleus, mitochon, and chloroplasts. In mitosis, ploidy doesn"t change (always diploid, 2n). But, c value doubles after s phase until end of anaphase. In meiosis, ploidy becomes in half (to produce haploid gametes), and c value becomes half by the end of meiosis i and becomes half again (1/4 of original c) by the end of meiosis ii. Meiosis telo/end-----8------------------8 (c) distribution of linear vs. circular chromosomes in the various domains of life. euk have linear chromosomes while arch/bac have circ role of nucleosomes in dna packaging in chromosomes. Used to pack large euk genomes into nucleus general trends in costs of dna sequencing. Declining; free by the end i graduate relative distribution of various component of genome sequence (junk vs. essential dna)
