A gene family is defined as a group of genes that encode related or identical products as a result of gene-duplication events.

TLS Online TPP Program

#Id: 2150

#Unit 9. Diversity of Life Forms

It is not surprising that size, shape, coloration, and many other traits undergo convergent evolution in diverse lineages

TLS Online TPP Program

#Id: 2151

#Unit 9. Diversity of Life Forms

Only four possible states of a particular site in a DNA sequence. A single base pair difference among species provides little reliable evidence about their phylogeny

TLS Online TPP Program

#Id: 2152

#Unit 9. Diversity of Life Forms

Use different parts of the genome to estimate different parts of a phylogeny.

TLS Online TPP Program

#Id: 2153

#Unit 9. Diversity of Life Forms

Rates of molecular evolution vary among DNA sites, among genes, and among lineages of organisms.

TLS Online TPP Program

#Id: 2154

#Unit 9. Diversity of Life Forms

Second positions most slowly evolve.

TLS Online TPP Program

#Id: 2155

#Unit 9. Diversity of Life Forms

Use more rapidly evolving parts of the genome to estimate phylogenies in the recent past. More slowly evolving parts for deeper evolutionary time.