Genetics Fundamentals Quiz

What is the term for the physical appearance of an organism as a result of its genotype?

• Genotype

• Phenotype

• Allele

• Dominance

If an organism has two identical alleles for a trait, it is considered:

• Heterozygous

• Homozygous

• Dominant

• Recessive

Which term describes an organism that has two different alleles for a trait?

• Homozygous

• Heterozygous

• Co-dominant

• Incomplete dominance

In genetics, what does the term "allele" refer to?

• A type of genetic disorder

• A variant form of a gene

• The study of heredity

• A dominant gene

Which term is used to describe a trait that will express itself in the offspring even if only one allele is present?

• Recessive

• Dominant

• Co-dominance

• Incomplete dominance

What is a pedigree chart used for in genetics?

• To predict the genotype of future offspring

• To track the inheritance of traits through generations

• To determine if alleles are dominant or recessive

• To identify genetic mutations

What is co-dominance?

• When both alleles are expressed equally in the phenotype

• When one allele is dominant over the other

• When the phenotype is a blend of both alleles

• When neither allele is dominant

Incomplete dominance is a situation in which:

• One allele completely masks the effect of the other

• Both alleles are expressed equally

• The phenotype is a blend of the two alleles

• The alleles segregate during meiosis

What does the genotype of an organism represent?

• The physical appearance of the organism

• The genetic makeup of the organism

• The dominant alleles only

• The environmental factors influencing traits

Which of the following best describes the relationship between genotype and phenotype?

• The genotype determines the phenotype

• The phenotype determines the genotype

• The genotype and phenotype are unrelated

• The phenotype can change the genotype