Unit 8 Exam Review

How are a gene and an allele related?

• An allele is an alternative form of a gene

• A gene is an alternative form of an allele

• A gene has many loci called alleles

• An allele is made up of many structures called genes

What term describes the physical traits of a person?

• Genotype

• Phenotype

• Genome

• Dominant

Which of the following represents a homozygous recessive genotype?

• Rr

• RR

• rR

• rr

Which of these pertains to Mendel’s law of independent assortment?

• Observable characteristics of a trait

• Separation of alleles during meiosis

• Random distribution of alleles

• Protein production

Which statement pertains to Mendel’s law of segregation?

• Homozygous organisms are called hybrids

• Two alleles for each trait separate during meiosis

• Allele pairs are called a genotype

• Dominant traits are visible

A distinguishing characteristic that can be inherited

• Cross

• Allele

• Gene

• Trait

Hair color and eye color are examples of a person’s

• Recessive trait

• Dominant alleles

• Genotype

• Phenotype

Organisms that have two identical alleles for a particular trait are said to be

• Hybrid

• Heterozygous

• Homozygous

• Dominant

When is a recessive allele expressed in offspring?

• When two copies are present

• When parents have no dominant alleles

• When the offspring is heterozygous

• When one copy is present

A Dd individual

• Has a homozygous genotype

• Has a heterozygous phenotype

• Has a heterozygous genotype

• Has a homozygous phenotype