Genetics Quiz

What are alleles?

• Recessive genes

• Variations of a gene

• Traits passed down from parents

• Dominant genes

Which type of alleles always express themselves?

• Heterozygous alleles

• Homozygous alleles

• Dominant alleles

• Recessive alleles

How are alleles notated?

• As letters

• As numbers

• As symbols

• As colors

What is the genotype of a snake with the alleles Hh?

• Homozygous

• Heterozygous

• Dominant

• Recessive

What is the genotype of a mouse with the alleles bb?

• Homozygous

• Heterozygous

• Recessive

• Dominant

What is the phenotype of an organism?

• The variation of a gene

• The expressed traits

• The pair of alleles

• The genetic type

What does homozygous mean?

• Having two of the same alleles

• Having two recessive alleles

• Having two dominant alleles

• Having two different alleles

What does heterozygous mean?

• Having two dominant alleles

• Having two different alleles

• Having two recessive alleles

• Having two of the same alleles

What is the purpose of a Punnett square?

• To predict the genotype of offspring

• To identify dominant alleles

• To determine the phenotype of an organism

• To study recessive traits

If Parent 1 has the genotype Hh and Parent 2 has the genotype Hh, what percentage of the offspring will have the dominant phenotype?

• 75%

• 50%

• 100%

• 25%