Question

what does it mean if a trait is multifactorial. Brown eyes have a pigment that absorbs light so appears darker but it's not that simple; there may be three multiple genes that affect eye colour (polygenic inheritance) so if a father has genotype Bb, bb, bb and a mother has genotype Bb, bb, Bb draw out the Punnet Square to show the possible genotype of their offspring

Accepted Answer

Multifactorial: a mixture of several genes and environmental factors contribute to the trait/disease (some genes make a person more susceptible to a disease)

The two possible gamete combinations of the father's sperm and the four possible gamete combinations of alleles in the mother's egg are lined up in a table where the two alleles of each gene combine in the offspring

Front	what does it mean if a trait is multifactorial. Brown eyes have a pigment that absorbs light so appears darker but it's not that simple; there may be three multiple genes that affect eye colour (polygenic inheritance) so if a father has genotype Bb, bb, bb and a mother has genotype Bb, bb, Bb draw out the Punnet Square to show the possible genotype of their offspring
Back	Multifactorial: a mixture of several genes and environmental factors contribute to the trait/disease (some genes make a person more susceptible to a disease) The two possible gamete combinations of the father's sperm and the four possible gamete combinations of alleles in the mother's egg are lined up in a table where the two alleles of each gene combine in the offspring

Bb Genes Genotype Offspring Gamete Combinations Alleles Trait