Having many genes affecting variation in a trait can produce nearly continuous (and bell-curve-shaped) variation in that trait because the continuous variation for complex traits is due to genetic complexity and environmental sensitivity.
Complex traits change regularly as a result of genetic complexity and environmental sensitivity. Segregating alleles at various loci leads to genetic complexity. Each of these alleles typically has a minimal impact on the phenotype, and their expression is environment-dependent.
Parent to child transmission of the fundamental component of heredity. The chromosomes in the nucleus of cells have particular sites where the DNA sequences that make up genes are ordered in a logical order, one after another.
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