In eukaryotes, important genes and satellite DNAs repeat {DNA repeat, genetics}. Eukaryotes have many repeated or duplicated DNA regions. Histone, rRNA, tRNA, and other genes that are fundamental to cell processes repeat many times in same chromosome regions {clustering, chromosome}.
gene duplication
Gene duplication allows variant protein forms to arise. Original gene still provides needed protein. Duplicate gene can mutate and recombine to make variant protein, such as globin chains. Duplication can revert, by gene conversion after sequence break, using normal sequence as template to repair mutant sequence.
Biological Sciences>Genetics>Nucleic Acid>Regions>DNA Repeat
4-Genetics-Nucleic Acid-Regions-DNA Repeat
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Date Modified: 2022.0224