According to Hardy-Weinberg principle, sum total of all the allellic frequencies is

Options

A. Zero
B. One
C. Infinite
D. Remain changeable

Answer

### Step-by-Step Solution:

1. **Understanding the Hardy-Weinberg Principle**: The Hardy-Weinberg principle is a fundamental concept in population genetics that describes how allele frequencies in a population remain constant over generations under certain conditions.

2. **Conditions for Hardy-Weinberg Equilibrium**: For the allele frequencies to remain constant, the following conditions must be met:
- No natural selection
- Random mating
- No mutation
- No migration
- Large population size (to minimize genetic drift)

3. **Allelic Frequencies**: The principle states that the sum of the frequencies of all alleles for a particular gene in a population is equal to 1. This can be expressed mathematically as:
\[ P + Q = 1 \]
where:
- \( P \) = frequency of the dominant allele
- \( Q \) = frequency of the recessive allele

4. **Conclusion**: Since the sum of the allelic frequencies (P + Q) equals 1, the answer to the question regarding the sum total of all allelic frequencies according to the Hardy-Weinberg principle is **1**.

### Final Answer:
The sum total of all the allelic frequencies is **1**.

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