BIOL 200 Lecture 20: Nov 11
7 Jun 2016
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Document Summary
Dna content varies more dramatically than gene number. Genome evolution: average gene size can be very different in different genomes depends on numbers and lengths of introns, gene with 3 exons, 2 introns. When transcribed, transcribed to pre-mrna splicing occurs 2 introns removes, 3 exons joined: the average gene size can vary greatly in different genomes depending on the numbers and length of introns. Average size of yeast gene 1. 6 kb. Average human protein is not 30 x bigger than yeast . Average human gene have 8 introns, yeast has 0. 05 introns. % of gene length that is intron:": yeast = 1, human = 95% Introns are why human genes are so big! Biol200: the amount of dna between genes can vary greatly in different genomes. In yeast the coding regions are separated by very few non-coding regions. Only 2% of genome is coding: fraction would but much higher for yeast.
