What term encompasses all genes, including all different alleles, present in a population?

The term that encompasses all genes, including all different alleles, present in a population is "gene pool." A gene pool is essentially the complete collection of genetic information within a breeding population. It includes all variations of genes that contribute to the hereditary makeup of individuals within that population.

This concept is crucial in understanding genetic diversity, evolution, and how traits may change over generations due to various factors such as natural selection, genetic drift, and gene flow. A diverse gene pool is typically associated with a healthier population, as it allows for more adaptability to environmental changes.

The other terms related to genetics focus on different aspects: "gene flow" refers to the transfer of genetic variation from one population to another; "genome" describes the complete set of genes or genetic material present in an organism; "genetic makeup" refers to the specific combination of alleles and genes in an individual rather than the broader population context represented by a gene pool.