Degeneration of a genetic code is attributed to the `:`

Options

A. entrire codon
B. third member of a codon
C. first member of a codon
D. seconds member of a codon

Explanation

To answer the question regarding the degeneration of a genetic code, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Genetic Code**: The genetic code consists of sequences of nucleotides in mRNA that are translated into amino acids. Each amino acid is coded by a sequence of three nucleotides known as a codon.

2. **Definition of Degeneracy**: Degeneracy in the genetic code refers to the phenomenon where multiple codons can code for the same amino acid. This means that there is redundancy in the genetic code.

3. **Codon Structure**: A codon is made up of three nucleotides. For example, the codon AUG codes for the amino acid Methionine.

4. **Wobble Hypothesis**: The wobble hypothesis explains how the degeneracy of the genetic code occurs. According to this hypothesis, the third nucleotide in a codon (the third member) is less critical for the specificity of the amino acid being coded. This allows for some flexibility in base pairing.

5. **Identifying the Correct Option**: Given the options:
- Entire codon
- 3rd member of a codon
- 1st member of a codon
- 2nd member of a codon

The correct answer is the **3rd member of a codon**. This is because the degeneracy of the genetic code is primarily attributed to the variability in the third position of the codon, which can change without altering the amino acid being produced.

### Final Answer:
The degeneration of a genetic code is attributed to the **3rd member of a codon**.

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