It can be a single nucleotide that is altered, or it can be a large deletion or insertion of bases. Related Topics: Genetics Evolution Design Contributed by: BU

as transcription. Next three nucleotide segments of RNA, called tRNA (transfer RNA), which are attached to specific amino acids, match up with the template strand of mRNA to order the amino acids correctly. These amino acids are then bonded

encoded strand of nucleotides , similar to DNA , but with a slightly different chemical structure. There are three main forms of RNA, each a slightly different function. mRNA (messenger RNA) is the mediating template between DNA and

body. It is caused by a one nucleotide substitution in one gene. This is a recessive mutation, meaning that the disease only develops when both copies of the gene (one on each duplicate chromosome ) contain the substitution. Interestingly, people

including changes in the nucleotide bases of DNA ; the other is at the level of the organism, including interactions between the organism expressing these changes and its environment. Chance also arises here in the sense that we cannot now

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