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Genetics Test

Total questions: 31

Worksheet time: 26mins

Name
Class
Date
1.

Tightly coiled DNA is called:

a)

FNA

b)

Chromosomes

c)

Cell

d)

Mitochondria

2.

 Human somatic cells (body) are:

a)

Diploid

b)

Haploid

3.

. Human Reproductive cells (sperm and egg) are:

a)

Diploid

b)

Haploid

4.

 Human haploid cells have

a)

1 set of 23 chromosomes

b)

1 set of 54 chromosomes

c)

2 sets of 23 chromosomes

d)

2 sets of 54 chromosomes

5.

Human Diploid cells have:

a)

1 set of 23 chromosomes

b)

1 set of 54 chromosomes

c)

2 sets of 23 chromosomes

d)

2 sets of 54 chromosomes

6.

Chromosome #1 - #22 are called

a)

Sex chromosomes

b)

Autosomes

c)

DNA

d)

Cytoplasm

7.

Chromosome #23 is called the:

a)

Sex chromosome

b)

Autosomes

c)

DNA

d)

Cytoplasm

8.

Female sex chromosomes are usually:

a)

XX

b)

XY

9.

Male sex chromosomes are usually:

a)

XX

b)

XY

10.

The part on a chromosome where a specific gene is located.

a)

Trait

b)

Locus

c)

Gene

11.

Codes in the DNA that give instructions about a specific traits

a)

Trait

b)

Locus

c)

Gene

12.

Physical characteristics about an individual.

a)

Trait

b)

Locus

c)

Gene

13.

An allele whose trait always shows up in the organism when the allele is present

a)

Dominant allele

b)

Recessive allele

14.

An allele that is masked when a dominant allele is present

a)

Dominant allele

b)

 Recessive allele

15.

Different form of a gene is called (letters):

a)

Trait

b)

 Locus

c)

 Allele

16.

An organism who is Tt (has two different alleles) is:

a)

homozygous

b)

heterozygous

17.

An organism who is tt (has two of the same alleles) is;

a)

homozygous

b)

heterozygous

18.

The physical characteristic of an organism (what it looks like):

a)

Phenotype

b)

Genotype

19.

The genetic makeup of an organism (the two letters):

a)

Phenotype

b)

Genotype

20.

If tall is dominant and short is recessive, what is the phenotype of Tt?

a)

Short

b)

Tall

21.

If tall is dominant and short is recessive, what is the phenotype of tt?

a)

Short

b)

Tall

22.

If tall is dominant and short is recessive, what is the phenotype of TT?

a)

Short

b)

Tall

23.

Type of reproduction that involves one parent and produces genetically identical offspring:

a)

Sexual reproduction

b)

Asexual reproduction

24.

Type of reproduction that involves two parents and produces genetically different offspring:

a)

Sexual reproduction

b)

Asexual reproduction

25.

What is the probability of blue eyes in this cross? _______%

What is the probability of brown eyes in this cross? _____%

4 lines
26.

What is the probability of having homozygous offspring? ______%

What is the probability of having heterozygous offspring? ________%

4 lines
27.

What is the probability of brown hair in this cross? _______%

What is the probability of blonde hair in this cross? ______%

4 lines
28.

What is the probability of having homozygous offspring? _______%

What is the probability of having heterozygous offspring? ________%

4 lines
29.

What is the probability of curly hair in this cross? _______%

What is the probability of straight hair in this cross? ______%

4 lines
30.

What is the probability of having homozygous offspring? _______%

What is the probability of having heterozygous offspring? ________%

4 lines
31.

A molecule that contains all the genetic information in an organism:

a)

DNA

b)

Lipids

c)

Carbohydrates

d)

Water