BIOL 200 Lecture Notes - Lecture 27: Genome Size, Noncoding Dna, Dna Profiling
Document Summary
Biol 200 - lecture 27, genes and genomes. Moving from chromosomes to the genome as a whole. We"ll make the contrast between bacteria (prokaryotes), yeast (simple eukaryote and humans (complex eukaryotes) It is not true that a big jump in complexity of an organism corresponds to a big jump in. Notice that we have 4x more genes than yeast, but our genome contains 250x more base pairs than the genome of yeast. Therefore, the size of the genome in terms of dna is not proportional to the size of the genome in terms of genes. For the number of genes we have, our genomes are way too big. This has to do with the structure of genes, containing introns. The average gene size between yeast and humans is very different because the number of introns and the size of introns are very different, Genes size introns/gene % of gene length that is intron.
