Mendelian and Non-Mendelian Genetics Quiz

In Mendelian inheritance, what percent of offspring would be expected to exhibit a recessive trait in a cross between two heterozygous parents (Aa x Aa)?

• 100%

• 0%

• 75%

• 25%

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NGSS.HS-LS3-3

What is the purpose of a Punnett square?

• To predict the outcome of genetic crosses

• To determine the genetic makeup of an individual

• To calculate the probability of inheriting a disease

• To visualize protein synthesis

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Which of the following is an example of non-Mendelian inheritance?

• Complete dominance

• Incomplete dominance

• Segregation

• Independent assortment

In incomplete dominance, the phenotype of the heterozygotes is a __________ of the phenotypes of the two homozygotes.

• Mixture

• Replica

• Blend

• Copy

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What is codominance?

• A situation where both alleles are fully expressed in the phenotype

• A situation where one allele completely masks the effect of another

• A situation where the phenotype is intermediate between the two homozygotes

• A situation where the alleles segregate independently

In a dihybrid cross between two heterozygous parents (AaBb x AaBb), what is the expected phenotypic ratio?

• 9:3:3:1

• 3:1

• 1:2:1

• 1:1:1:1

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NGSS.HS-LS3-3

Which of the following is NOT a principle of Mendelian inheritance?

• Principle of Dominance

• Principle of Independent Assortment

• Principle of Segregation

• Principle of Polygenic Inheritance

If a red-flowered plant (RR) is crossed with a white-flowered plant (WW) and all the offspring have pink flowers, this is an example of:

• Codominance

• Incomplete dominance

• Complete dominance

• Multiple alleles

Which of the following crosses would produce offspring in a 2:2 ratio of phenotypes?

• Aa x Aa

• Aa x aa

• AA x aa

• AA x Aa

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NGSS.HS-LS3-1

What does it mean if a trait is said to have multiple alleles?

• The trait is influenced by more than two genes

• The trait can be found in more than two forms

• More than two alleles exist in the population for that gene

• The trait is affected by environmental factors

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NGSS.HS-LS3-3