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Mendel's Laws: Grade 9 Science

Total questions: 18

Worksheet time: 54mins

Name
Class
Date
1.

An allele is:

a)

Another word for gene

b)

A heterozygous genotype

c)

A homozygous genotype

d)

One of several different forms of a gene

2.

Phenotype refers to the _________ of an organism.

a)

genetic makeup

b)

alleles

c)

observable characteristics

d)

mutations

3.

Which of the following genotypes are homozygous?

a)

Tt

b)

tt

c)

t

d)

T

4.

An organism has a heterozygous genotype (Tt), but is appears tall instead of short.

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

5.

One gene for the type of earlobes a person will have will be in each gamete.

a)

Law of Dominance

b)

Law of Independent Assortment

c)

Law of Segregation

6.

Which of Mendel's laws states that alleles are separated during meiosis?

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

7.

Which of Mendel's laws states that alleles are distributed to gametes independently of one another?

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

8.

If a dominant allele is present, the trait will always appear in the organism.

a)

Law of Segregation

b)

Law of Dominance

c)

Law of Independent Assortment

9.

The Law of Segregation applies to mitosis.

a)

True

b)

False

10.

Genes are:

a)

The allele combination of an organism

b)

Different forms of genes

c)

Alleles for traits that are the same

d)

Factors that determine traits

11.

Genotype is:

a)

The allele combination of an organism

b)

Different forms of genes

c)

Alleles for traits that are the same

d)

Factors that determine traits

12.

Dominant alleles are represented with a(n):

a)

Capital letter

b)

Lower-case letter

c)

Shape

d)

Emoji

13.

Characteristics that are inherited are called:

a)

Gametes

b)

Zygotes

c)

Traits

d)

Hybrids

14.

An organism is ______ for a trait if its two alleles for the trait are the same.

a)

Homozygous

b)

Heterozygous

c)

Hybrid

d)

Gamete

15.

An organism is ______ for a trait if its two alleles for the trait differ from each other.

a)

Heterozygous

b)

Homozygous

c)

Recessive

d)

Dominant

16.

Gregor Mendel is known as the:

a)

Father of Modern Medicine

b)

Father of the Green Revolution

c)

Father of Genitics

d)

Pea Plant Man

17.

Gregor Mendel was born in what country?

a)

Austraila

b)

Austria

c)

Germany

d)

Switzerland

18.

What did Gregor Mendel use to discover the patterns that rule the study of genetics?

a)

Pea plants

b)

Pigeons

c)

Pear trees

d)

Potatoes