Genetics Quiz

What is the study of heredity and genes called?

• Allele

• Genetics

• Heredity

• Phenotype

What type of cross involves breeding between two pure homozygous parents differing in a single trait?

• Back Cross

• Monohybrid Cross

• Test Cross

• Dihybrid Cross

In Mendelian genetics, what is the expected phenotypic ratio of a monohybrid cross?

• 9:3:3:1

• 1:2:1

• 3:1

• 1:1

What is the term for an organism with two different alleles for a trait?

• Genotype

• Phenotype

• Heterozygous

• Homozygous

Which law states that alleles for different traits are distributed to gametes independently?

• Law of Segregation

• Law of Dominance

• Law of Independent Assortment

• Law of Epistasis

What is the expected phenotypic ratio in a dihybrid cross?

• 1:1

• 3:1

• 9:3:3:1

• 1:2:1

What type of gene interaction occurs when one gene masks the effect of another?

• Dominance

• Epistasis

• Codominance

• Incomplete Dominance

What is the term for the presence of three or more alleles at a locus?

• Multiple Alleles

• Polygenic Inheritance

• Heterozygous

• Homozygous

In blood group inheritance, which genotype results in blood group O?

• ii

• Ai

• AB

• AA

What is the expected ratio of phenotypes in a test cross involving a heterozygous tall plant?

• 3:1

• 1:1

• 9:3:3:1

• 1:2:1