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Genetics Vocab Quiz

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

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

a)

Dominant

b)

Heterozygous

c)

Homozygous

d)

Recessive

2.

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

a)

Dominant

b)

Heterozygous

c)

Homozygous

d)

Recessive

3.

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

a)

Dominant

b)

Heterozygous

c)

Homozygous

d)

Recessive

4.

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

a)

Dominant

b)

Heterozygous

c)

Homozygous

d)

Recessive

5.

In the picture, what letter represents the dominant allele?

a)

B

b)

b

6.

In the picture, what letter represents the recessive allele?

a)

B

b)

b

7.

In the picture, what letter combination is heterozygous?

a)

BB

b)

bb

c)

Bb

8.

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

a)

BB

b)

bb

c)

Bb

9.

Which of the following situations BEST demonstrates codominance?

a)

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

b)

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

c)

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

d)

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

10.

What term describes a different form of a gene?

a)

Allele

b)

Codominance

c)

Gene

d)

Genotype

e)

Phenotype

11.

What term describes a condition in which two different alleles for a gene are both expressed to an equal degree in an individual?

a)

Allele

b)

Codominance

c)

Gene

d)

Genotype

e)

Phenotype

12.

What term describes a segment of DNA that codes for a specific trait?

a)

Allele

b)

Codominance

c)

Gene

d)

Genotype

e)

Phenotype

13.

What term describes an organism's genetic makeup or allele combinations?

a)

Allele

b)

Codominance

c)

Gene

d)

Genotype

e)

Phenotype

14.

What term describes an organism's physical appearance or visible trait?

a)

Allele

b)

Codominance

c)

Gene

d)

Genotype

e)

Phenotype

15.

Which of the following statements correctly identifies the phenotype and the genotype in this picture?

a)

Brown eyes is the genotype, and Bb is the phenotype.

b)

Bb is the genotype, and brown eyes is the phenotype.