In the past, human populations were controlled by:
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The interaction between genetics and environment and how this affects behavior, resulting in individual variances, is of particular interest to behavior geneticists.
The environment in this context refers to every external, nongenetic component of our life, including prenatal nutrition and the people and objects in our immediate surroundings.
Chromosomes:
Each of our cells contains 46 chromosomes, 23 from our mother and 23 from our father. Chromosomes are complicated, spiraling molecules formed of DNA that resemble threads and contain genes.
DNA:
We have over 30,000 genes, which are DNA segments that, when activated (expressed), serve as templates for the synthesis of different protein molecules, which serve as the foundation for our physical and behavioral growth.
Genome:
The entire collection of instructions for creating an organism, included in all of its chromosomal genetic material, is called an organism's genome.
Gene:
Combinations of mutations at certain gene locations serve to distinguish us from one another. The majority of human features are not controlled by a single gene acting alone, but rather by a number of genes working together.
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