Genetics Quiz

What are alleles?

• Segments of DNA that code for proteins

• Alternative forms of a gene

• Mutations in the genetic code

• Different species of organisms

How many types of alleles are there?

• 1

• 3

• 4

• 2

What is the difference between dominant and recessive alleles?

• Dominant alleles are expressed when present in an individual's genotype, while recessive alleles are only expressed when paired with another recessive allele.

• Dominant alleles are always harmful, while recessive alleles are always beneficial.

• Dominant alleles are only expressed when paired with another dominant allele, while recessive alleles are always expressed.

• Dominant alleles are more common in the population than recessive alleles.

What is a homozygous allele?

• A pair of identical alleles for a particular gene.

• A pair of different alleles for a particular gene.

• An allele that is only present in females.

• An allele that is only present in males.

What is a heterozygous allele?

• A pair of genes where one is dominant and the other is recessive.

• A pair of genes where both are dominant.

• A pair of genes where one is neither dominant nor recessive.

• A pair of genes where both are recessive.

What is a genotype?

• The physical characteristics of an organism

• The environment in which an organism lives

• The behavior of an organism

• The genetic makeup of an organism

What is a phenotype?

• Observable physical or biochemical characteristics of an organism

• The process of cell division

• The study of animal behavior

• The genetic material of an organism

Which type of allele is expressed in the phenotype when present?

• Neutral allele

• Dominant allele

• Recessive allele

• Incomplete allele

Which type of allele is masked in the phenotype when present?

• Recessive allele

• Co-dominant allele

• Homozygous allele

• Dominant allele

What is the relationship between genotype and phenotype?

• Genotype is only influenced by genetics and not the environment

• Genotype refers to the genetic makeup of an organism, while phenotype refers to the physical characteristics and traits that result from the interaction between an organism's genotype and its environment.

• Genotype and phenotype are the same thing

• Phenotype determines genotype