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Chapter 10: Problem 13

Why would an overlapping genetic code be restrictive?

Short Answer

Expert verified
An overlapping genetic code would be restrictive because a single nucleotide might be part of more than one codon, thus a mutation in the single nucleotide could affect multiple codons. This restricts the number of viable mutations, rendering overlapping codes less flexible in enabling genetic variations.

Step by step solution

01

Understand the genetic code and overlapping

A genetic code can be explained as the set of rules that convert a nucleotide sequence in DNA or mRNA to an amino acid sequence in proteins. Overlapping genetic code signifies that a single nucleotide might be part of more than one codon.
02

Analyze the effect of mutation

In an overlapping situation, a mutation or any change in a single nucleotide can influence multiple codons. This amplifies the effect of mutations on the coding of proteins.
03

Realize the restrictiveness

Because changes could potentially affect multiple codons, genetic information storage via overlapping would considerably limit the number of viable mutations. Hence, overlapping codes are restrictive as they do not allow for much genetic variation.

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