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Simple Genetics Practice

Total questions: 13

Worksheet time: 7mins

Name
Class
Date
1.

Different versions of a gene are known as _____.

a)

Alleles

b)

Genotype

c)

Phenotype

2.

How many copies of each gene does a person have?

a)

1

b)

2

c)

3

d)

4

3.

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

a)

Dominant

b)

Recessive

4.

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

a)

Genotype

b)

Phenotype

5.

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

a)

Genotype

b)

Phenotype

6.

Which of these letters represents a dominant allele?

a)

A

b)

a

7.

Which of these letters represents a recessive allele?

a)

A

b)

a

8.

Which of these is a homozygous dominant genotype?

a)

AA

b)

Aa

c)

aa

9.

Which of these is a homozygous recessive genotype?

a)

AA

b)

Aa

c)

aa

10.

Which of these is a heterozygous genotype?

a)

AA

b)

Aa

c)

aa

11.

If purple flowers are dominant to white flowers, what would the phenotype be of an individual who has the genotype Aa?

a)

Purple flowers

b)

White flowers

12.

If purple flowers are dominant to white flowers, what would the phenotype be of an individual who has the genotype aa?

a)

Purple flowers

b)

White flowers

13.

If purple flowers are dominant to white flowers, what would the phenotype be of an individual who has the genotype AA?

a)

Purple flowers

b)

White flowers