Non-Mendelian Traits Quiz

Non-Mendelian traits are traits that don't follow the basic rules of dominance and recessiveness that you have learned about so far. This includes: __________ dominance

• Codominance

• Incomplete dominance

• Overdominance

• Pleiotropy

Answer explanation

Codominance is a non-Mendelian trait where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive. This distinguishes it from traditional dominance patterns.

In this class, we will use all capital letters to indicate incompletely dominant alleles. In this example, the _______ is incompletely dominant over _______, so flowers with genotype RW have the phenotype _______.

• R, W, pink

• W, R, white

• R, W, red

• W, R, purple

Answer explanation

In this example, R (red) is incompletely dominant over W (white), resulting in RW genotype producing a pink phenotype. Therefore, the correct answer is R, W, pink.

This image is an example of:

• Codominance

• Multiple alleles

• Incomplete dominance

• Mendelian inheritance

• A polygenic trait

Non-Mendelian traits are traits that don't follow the basic rules of dominance and recessiveness that you have learned about so far. This includes: ___________

• Incomplete

• Codominance

• Polygenic inheritance

• Multiple alleles

Answer explanation

Incomplete dominance is a non-Mendelian trait where the phenotype is a blend of the two parental traits, unlike simple dominance. This contrasts with codominance, polygenic inheritance, and multiple alleles, which also represent non-Mendelian patterns.

Non-Mendelian traits are traits that don't follow the basic rules of dominance and recessiveness that you have learned about so far. This includes: __________ traits

• Polygenic

• Monogenic

• Autosomal

• Dominant

Answer explanation

Polygenic traits involve multiple genes and do not follow simple dominance patterns, making them non-Mendelian. In contrast, monogenic, autosomal, and dominant traits adhere to Mendelian inheritance rules.

In our class we will indicate codominance by using capital letters for all traits, for example, ________

• RW

• AB

• XY

• PQ

Answer explanation

In codominance, both alleles are expressed equally. The correct representation is RW, where R and W are both capital letters indicating that both traits are visible in the phenotype.

Non-Mendelian traits are traits that don't follow the basic rules of dominance and recessiveness that you have learned about so far. This includes: __________

• Multiple alleles

• Incomplete dominance

• Codominance

• Polygenic inheritance

Answer explanation

Multiple alleles refer to the presence of more than two alleles for a trait, which leads to variations that do not fit simple dominant-recessive patterns. This is a key example of non-Mendelian inheritance.

Which of the following is NOT a characteristic of non-Mendelian inheritance?

• Multiple alleles

• Incomplete dominance

• Single gene control

• Epistasis

Which type of allele inhertitance has MORE than two alleles?

• Complete Dominance

• Incomplete Dominance

• Multiple Allele

• Codominance

In codominance, both alleles are __________ in the phenotype.

• equally expressed

• not expressed

• partially expressed

• dominant