Biology 1201A Chapter Notes - Chapter 16: Noncoding Dna, Exon, Meiosis
18 Dec 2017
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Document Summary
Members of both the domain bacteria and the domain archae have genomes that vary widely in size and their genes are densely packed with very little noncoding spaces. Members of the domain eukarya vary in form and complexity, and their genomes also show great differences in size and gene density. Even within a different genus, different species often have widely differing genome sizes. Larger genomes of organisms tend to reflect to an increased gene number, but this is not always the case (often due to densely packed genes. ) Genome: the amount of dna in one complete set of chromosomes. Measured in amounts (mega base"s) or mass (pictogram"s) C-value paradox - no real relationship between the type or complexity of an organism and the amount of dna. Dna can also be found in chloroplasts and mitochondria. Karyotype: an organized image of all the chromosomes in a cell. Ploidy: the number of sets of chromosomes in the nucleus of a cell.
