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2-4 molecular and genomic evolution

2-4 molecular and genomic evolution - MOLECULAR AND GENOMIC...

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MOLECULAR AND GENOMIC EVOLUTION LIFE 24 24.1 What can genomes reveal about evolution? -An organism’s genome is the full set of genes it contains, as well as any noncoding regions of the DNA - Mutations are essential for the long-term survival of life, for without the genetic variation they provide, organisms could not evolve in response to changes in their environment 24.1.1 Evolution of genomes results in biological diversity -field of molecular evolution investigates the mechanisms and consequences of the evolution of macromolecules -The evolution of nucleic acids and proteins depends on genetic variation introduced by mutations i.e. nucleotide substitutions : some can result in amino acid replacements in the encoded proteins changes in the amino acid sequence of a protein can changes the charge, as well as the structure, of the protein changes in function -any features shared by two or more species that have been inherited from a common ancestor are said to be homologous 24.1.2 Genes and proteins are compared through sequence alignment
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