Multiple Choice Questions on Genetics

What is the definition of a genotype?

• The physical appearance of an organism

• The genetic makeup of an organism

• The environment’s effect on an organism

• The proteins an organism produces

Which of the following is an example of a phenotype?

• BB (homozygous dominant for brown eyes)

• The DNA sequence of a gene

• Blue eyes

• The alleles inherited from parents

Which statement is true about genotype and phenotype?

• Genotype always determines phenotype without exceptions

• Phenotype is determined only by the environment

• Two organisms with the same genotype always have the same phenotype

• The same genotype can sometimes result in different phenotypes due to environmental factors

What is the relationship between genotype and phenotype?

• Genotype refers to the physical traits, while phenotype refers to the genetic makeup

• Genotype determines phenotype, but environmental factors can influence phenotype

• Phenotype determines genotype

• Genotype and phenotype are the same

If a person has the genotype “Bb” for eye color, what does this mean?

• They have two identical alleles for eye color

• They have two different alleles for eye color

• They must have blue eyes

• Their environment determines their eye color completely