Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem

Bully whippets are homozygous for a deletion of two base pairs in the mynsta.tin gene. This deletion changes an mRNA codon in the middle of the myostatin mRNA from UCU to UCA. Use your knowledge of the genetic code (Section 7.4) to determine the effect of this mutation on the structure of the resulting protein.

Summary Introduction

To determine: The effect of the mutation on the structure of the resulting protein using the concept of genetic code.

Concept introduction: The genetic code is the set of rules by which information encoded within the genetic material is translated into the respective protein by the cell. A codon is a combination of three nucleotide bases that code for a particular amino acid in a polypeptide chain of a protein. One of the noticing features of the genetic code is its resistance to any sort of mutations. Mutation is the sudden heritable changes that occur in a DNA content of an organism. Mutation can be of three types namely beneficial, harmful, or neutral.


The DNA or RNA sequences that do not code for an amino acid is known as stop codons. UAG, UAA, and UGA are the stop codons. The myostatin genes are formed by the myocytes. This gene inhibits the muscle cell growth and their differentiation in bully whippets...

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