Genetics Vocab Quiz

What term describes an organism that has 2 different alleles for a trait?

• Dominant

• Heterozygous

• Homozygous

• Recessive

What term describes an allele whose trait always shows up in the organism when the allele is present?

• Dominant

• Heterozygous

• Homozygous

• Recessive

What term describes an allele that is masked when the dominant allele is present?

• Dominant

• Heterozygous

• Homozygous

• Recessive

What term an organism that has 2 of the same alleles for a trait?

• Dominant

• Heterozygous

• Homozygous

• Recessive

In the picture, what letter represents the dominant allele?

• B

• b

Tags

NGSS.HS-LS3-1

In the picture, what letter represents the recessive allele?

• B

• b

In the picture, what letter combination is heterozygous?

• BB

• bb

• Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In the picture, what letter combination is homozygous? (Select ALL that apply.)

• BB

• bb

• Bb

Which of the following situations BEST demonstrates codominance?

• A person with an allele for blue eyes and an allele for brown eyes has brown eyes.

• A flower with an allele for red petals and an allele for white petals has pink petals.

• A cow with an allele for white fur and an allele for brown fur has roan fur (white fur with large brown patches).

• A dog with two alleles for floppy ears has floppy ears.

What term describes a different form of a gene?

• Allele

• Codominance

• Gene

• Genotype

• Phenotype

Tags

NGSS.HS-LS3-2