Why is it that having many genes affecting variation in a trait can produce nearly continuous (and bell curve - shaped) variation in that trait?
1 point

Because of variable penetrance of the individual genes

Because many different combinations of genes create the "mean" trait value, which results in many intermediate phenotypes and few combinations of genes that create the extreme trait values

Because the genes are all linked on the same chromosome if they affect the same trait

Because the genes individually have alleles exhibiting dominance in their effect on the trait

Question

Why is it that having many genes affecting variation in a trait can produce nearly continuous (and bell curve - shaped) variation in that trait?
1 point

Because of variable penetrance of the individual genes

Because many different combinations of genes create the "mean" trait value, which results in many intermediate phenotypes and few combinations of genes that create the extreme trait values

Because the genes are all linked on the same chromosome if they affect the same trait

Because the genes individually have alleles exhibiting dominance in their effect on the trait

Accepted Answer

∻Answer∻ ⚹ Because many different combinations of genes create the "mean" trait value, which results in many intermediate phenotypes and few combinations of genes that create the extreme trait values ⚹ ∻Solution∻ ‖ a ⋮ Polygenic inheritance: Traits that are influenced by multiple genes, known as polygenic traits, can show a wide range of phenotypes. ‖ ‖ b ⋮ Additive effects: Each gene involved in determining a polygenic trait contributes a small amount to the phenotype, and these effects can add up to produce a continuous range of variation. ‖ ‖ c ⋮ Normal distribution: When large numbers of genes are involved, the combination of their additive effects tends to produce a bell curve of phenotypes in a population, with most individuals having an intermediate phenotype. ‖ ∻Key Concept∻ ⚹ Polygenic inheritance ⚹ ∻Explanation∻ ⚹ Polygenic traits are influenced by multiple genes, which can lead to a continuous range of phenotypes that often follow a normal distribution, resulting in a bell curve-shaped variation. ⚹◊What role does genetic recombination play in generating continuous variation in traits influenced by multiple genes?⍭ Generate me a similar question◊

Sia