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Worksheets

Genotypes and Alleles in Genetics

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

Having two identical alleles

a)

Dominant

b)

Recessive

c)

Homozygous

d)

Heterozygous

2.

Have two different alleles.

a)

Dominant

b)

Recessive

c)

Homozygous

d)

Heterozygous

3.

Which of the following genotypes is homozygous dominate?

a)

BB

b)

Bb

c)

bb

4.

Which of the following genotypes is homozygous recessive?

a)

BB

b)

Bb

c)

bb

5.

Which of the following genotypes is heterozygous?

a)

BB

b)

Bb

c)

bb

6.

This two letter combination represents the genetic makeup of a gene.

a)

Genotype

b)

Phenotype

c)

Allele

d)

Homozygous

7.

The physical display of a trait.

a)

Genotype

b)

Phenotype

c)

Homozygous

d)

Heterozygous

8.

What term describes an organism's genetic makeup?

a)

Genotype

b)

Phenotype

c)

Trait

d)

Allele

9.

Which of the following is an example of a phenotype?

a)

BB

b)

Tall plant

c)

Bb

d)

bb

10.

What is the term for a version of a gene?

a)

Genotype

b)

Phenotype

c)

Allele

d)

Chromosome

11.

What is the term for the observable characteristics of an organism?

a)

Genotype

b)

Phenotype

c)

Allele

d)

Chromosome

12.

Genotype

a)

Bb

b)

Brown eyes

13.

Phenotype

a)

Rr

b)

Red eyed

14.

Bb, CWCR, BB

a)

Genotype

b)

Phenotype

15.

Red eyes, Female hemophilia, brown fur

a)

Genotype

b)

Phenotype