Sum total of genes with all these alleles at any time in a unit of evolution is called.

Options

A. Genotype
B. Genome
C. Gene pool
D. Gene library

Answer

To solve the question "Sum total of genes with all these alleles at any time in a unit of evolution is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking for a term that describes the total collection of genes and their variations (alleles) present in a population at a given time in the context of evolution.

2. **Analyze the Options**: We have four options to consider:
- **Genotype**: Refers to the genetic makeup of an individual organism. It does not represent the totality of genes in a population.
- **Genome**: This term refers to the complete set of genetic information in an organism. While it encompasses all genes, it is specific to an individual, not a population.
- **Gene Pool**: This term specifically refers to the total collection of all alleles (variations of genes) present in a population at a given time. This is a key term in population genetics.
- **Gene Library**: This is a collection of DNA sequences that are stored for research purposes. It does not refer to the genetic composition of a population.

3. **Identify the Correct Answer**: From the definitions analyzed, the term that best fits the description in the question is "Gene Pool." It represents the sum total of genes with all their alleles in a population, making it the correct answer.

4. **Conclusion**: Therefore, the answer to the question is **Gene Pool**.