Intro to Genetics

Different versions of a gene are known as _____.

• Alleles

• Genotype

• Phenotype

How many copies of each gene does a person have?

• 1

• 2

• 3

• 4

An allele that masks or covers up the other is known as ____.

• Dominant

• Recessive

The combination of alleles an individual has is known as its _____.

• Genotype

• Phenotype

The observable trait an individual has is known as its _____.

• Genotype

• Phenotype

Which of these letters represents a dominant allele?

• A

• a

Which of these letters represents a recessive allele?

• A

• a

Which of these is a homozygous dominant genotype?

• AA

• Aa

• aa

Which of these is a homozygous recessive genotype?

• AA

• Aa

• aa

Which of these is a heterozygous genotype?

• AA

• Aa

• aa