Polygenic Daily

What type of inheritance is determined by multiple genes and there can be a range of traits?

• Codominance

• Incomplete dominance

• Polygenic traits

Examples include skin color and height (the individual's phenotype exists somewhere along a spectrum)

• polygenic inheritance

• multiple alleles

• linked genes

• incomplete dominance

When calculating the probability of a phenotype occurring from a polygenic trait we must ​ (a)   the probability of the desired genotype occuring phenotype from each gene of both parents.

• multiply
• add
• subtract
• divide

If the genotype of gene in two parents is Aa and Aa, what percent chance would they have of getting AA in their offspring? (answer in decimal form)

• 0

• .25

• .5

• 1.00

If the genotype of gene in two parents is Aa and Aa, what percent chance would they have of getting Aa in their offspring? (answer in decimal form)

• 0

• .25

• .5

• 1.00

If a trait is polygenic and has two traits. One parent is AaBb and the other is Aabb. We calculated the probability of each trait to be recessive. The first trait has a chance of 0.25 to be aa. The second has a chance of .50 to be bb. What percent chance would the individual have to be fully recessive (aabb)?

• .75

• .125

• .5

• 25%

If two relatively tall parents have a child, what percent chance do they have of having a very tall child (AABBCC)? The parents genotypes are AABBCc and AABbCC.

• 0%

• 25%

• 50%

• 100%