Genetics Basics Quiz

Who is known as the father of genetics?

• Charles Darwin

• Gregor Mendel

• James Watson

• Francis Crick

What plants did Gregor Mendel use for his genetic experiments?

• Tomato plants

• Maize plants

• Pea plants

• Wheat plants

Which of the following is NOT one of Mendel's laws of genetics?

• Law of Segregation

• Law of Independent Assortment

• Law of Dominance

• Law of Mutation

If a trait is dominant, it will be expressed if the individual has how many dominant alleles?

• 2

• 1

• 0

• It depends on the trait

What does the genotype of an organism refer to?

• The physical appearance of an organism

• The set of alleles an organism has

• The environment the organism lives in

• The traits passed on from the parents

What does the phenotype of an organism refer to?

• The set of alleles an organism has

• The traits passed on from the parents

• The physical appearance of an organism

• The environment the organism lives in

If a pea plant has a genotype of Tt, where "T" is the allele for tall plants and "t" is the allele for short plants, what is its phenotype?

• Short

• Tall

• Medium

• Cannot be determined

Which of the following is an example of a recessive trait?

• Brown eyes in humans

• Attached earlobes in humans

• Purple flowers in pea plants

• Yellow seeds in pea plants

In Mendel's experiments, what was the ratio of dominant to recessive phenotypes in the F2 generation for a single trait cross?

• 1:1

• 2:1

• 3:1

• 4:0

What is the expected genotype ratio for a monohybrid cross between two heterozygous parents (Aa x Aa)?

• 1:2:1 (AA:Aa:aa)

• 3:1 (AA:aa)

• 2:1:1 (AA:Aa:aa)

• 1:3 (Aa:aa)