Gene pool can be defined as

Options

A. sum total of genes of all individuals of interbreeding population
B. sum total of genes present in an individual
C. total number of genes of all individuals in a given geographical area
D. total number of genes present among all species in the biosphere

Answer

To solve the question "Gene pool can be defined as," we need to analyze the options provided and understand the concept of a gene pool.

### Step-by-Step Solution:

1. **Understanding the Concept of Gene Pool**:
- A gene pool refers to the complete set of genetic information (alleles) within a population. It includes all the genes and their variants present in the individuals of that population.

2. **Analyzing the Options**:
- **Option 1**: "Sum total of the genes of all individuals of an interbreeding population."
- This option correctly defines a gene pool as it encompasses all the genetic material from individuals that can interbreed.
- **Option 2**: "Sum total of genes present in an individual."
- This option is incorrect because it refers to the genetic material of a single individual, not a population.
- **Option 3**: "Number of genes of all individuals in a given geographical area to a total number of genes present among all species in a biosphere."
- This option is also incorrect as it mixes concepts and does not accurately define a gene pool.

3. **Conclusion**:
- After analyzing the options, we conclude that the correct definition of a gene pool is given by **Option 1**: "Sum total of the genes of all individuals of an interbreeding population."

### Final Answer:
The correct answer is **Option 1**.

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