Non-Mendelian Genetics

What is a key characteristic of Non-Mendelian traits?

• They always follow simple dominant/recessive rules

• They are genetically unpredictable

• They are considered "rulebreakers" in genetics

• They only affect plants

How do Non-Mendelian traits differ from Mendelian traits in terms of allele expression?

• Non-Mendelian traits always show the dominant allele

• Mendelian traits involve more than two alleles

• Non-Mendelian traits do not always follow the rule that a dominant allele means the dominant trait will show

• Mendelian traits are influenced by the environment

In incomplete dominance, what happens when a dominant allele is present with a recessive allele?

• The dominant allele is fully expressed

• The recessive allele is fully expressed

• An intermediate phenotype is expressed

• Both alleles are fully expressed

If a red snapdragon (RR) is crossed with a white snapdragon (rr) and the trait shows incomplete dominance, what color will all the offspring be?

• Red

• White

• Pink

• Red and White striped

If two pink snapdragons (Rr) are crossed, what are the possible colors of their offspring?

• Only pink

• Only red and white

• Red, white, and pink

• Only red

What is the main characteristic of codominance?

• One allele completely masks the other

• A blend of two traits appears

• Both alleles are fully and separately expressed

• The trait is only expressed in one gender

If a black chicken (BB) is crossed with a white chicken (WW) and the trait shows codominance, what will the offspring look like?

• All black

• All white

• All gray

• All speckled (both black and white feathers)

Which term describes a genetic scenario where both alleles are expressed equally and distinctly, rather than blending?

• Incomplete dominance

• Mendelian inheritance

• Codominance

• Polygenic trait

What is the key difference between incomplete dominance and codominance?

• Incomplete dominance results in a blend, while codominance shows both traits distinctly

• Incomplete dominance only affects plants, while codominance affects animals

• Codominance results in a blend, while incomplete dominance shows both traits distinctly

• There is no difference, they are the same

Which of the following human traits is an example of a polygenic trait?

• Blood type

• Hair color

• Height

• Dimples