Yeast genes are short, but genes in flies and mammals have a dispersed bimodal distribution extending to very long sizes.

#Id: 3510

#Unit 2. Cellular Organization

Mutations occur at the same rate in both exons and introns, but exon mutations are eliminated more effectively by selection.

#Id: 3511

#Unit 2. Cellular Organization

#Id: 3512

#Unit 2. Cellular Organization

Exons are usually short, typically encoding fewer than 100 amino acids

Exon sequences are conserved by the negative selection of individuals in which the sequences have changed.

#Id: 3513

#Unit 2. Cellular Organization

In the fruit fly, gene sizes have a bimodal distribution—many are short but some are quite long

#Id: 3514

#Unit 2. Cellular Organization

#Id: 3515

#Unit 2. Cellular Organization