Non-Mendelian Genetics

Codominant and incompletely dominant traits have three phenotypes instead of two. How many alleles (versions of the gene) are involved?

• 1

• 2

• 3

• 4

In snapdragons, flower color is an incompletely dominant trait. Which genotype will lead to a third blended phenotype?

• Homozygous dominant

• Heterozygous

• Homozygous recessive

• Codominant

Red is incompletely dominant to white in snapdragons. Which cross would result in 100% pink flowers?

• RR x rr

• rr x rr

• Rr x Rr

• RR x RR

Tags

NGSS.HS-LS3-1

In humans, curly hair is dominant to straight hair, and wavy hair is an intermediate texture. Which explanation most likely accounts for wavy hair?

• a mutation occurred, producing wavy hair

• a different set of genes resulted in wavy hair

• inheritance occurred through incomplete dominance

• inheritance occurred as a result of a gene from only one parent

In chickens, black is co dominant with white feathers. Which cross would result in 50% black and white feathers?

• BW x BW

• BB x WW

• BW x WW

• WW x BB

Tags

NGSS.HS-LS3-3

In a certain breed of cattle, both red and white hairs show up together. This is an example of which type of inheritance pattern?

• incomplete dominance

• codominance

• multiple alleles

• polygenic inheritance

What is name for traits that are controlled by many genes such as height and skin color?

• complete dominance

• incomplete dominance

• co dominance

• polygenic

• multiple alleles

What are the genotypes for type A blood?

• I^AI^A

• I^AI^B

• I^Ai

• I^BI^B

• ii

A child has blood type AB. Which blood types would his parents most likely have?

• B and O

• O and A

• A and B

• AB and O

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which could NOT result from a cross between I^AI^B and I^Ai?

• Type A Blood

• Type B Blood

• Type AB Blood

• Type O Blood

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2