Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Genetics Unit Review (DNA, Meiosis, Mendelian and Non Mendelian)

Total questions: 42

Worksheet time: 52mins

Name
Class
Date
1.
An allele that is masked when a dominant allele is present. The "weaker" gene. 
a)
Dominant Allele
b)
Recessive Allele
2.
An allele whose trait always shows up in the organism when the allele is present. The "stronger" gene. 
a)
Dominant Allele
b)
Recessive Allele
3.
An organism’s genetic makeup or allele combination.
a)
Genotype
b)
Phenotype
c)
Beanotype
d)
Notype
4.
An organism’s physical appearance, or visible traits. 
a)
Genotype
b)
Phenotype
c)
Beanotype
d)
Notype
5.
What is called when a organism has  two different alleles for a trait. Tt or Rr
a)
Heterozygous
b)
Homozygous
c)
Domozygous
d)
Thermozygous
6.
Which statement correctly describes meiosis?
a)
Cells divide only once.
b)
Meiosis does not occur in reproductive cells.
c)
The cells produced at the end of meiosis are genetically identical to the parent cell.
d)
The cells produced at the end of meiosis contain half the number of chromosomes as the parent cell.
7.
Which of the following is a phenotype?
a)
Aa
b)
black hair
c)
heterozygous genes
d)
mutated DNA
8.
What causes genetic variation in meiosis?
a)
chromosomes lining up
b)
crossing over of chromosomes
c)
separation of chromosomes
d)
chromosomes pulling apart
9.
What is the genotype of a person with type A blood, who had a father with type O blood?
a)
AB
b)
AO
c)
AA
d)
OO
10.
A woman has type B blood and her husband has type O blood.  What must be the woman's genotype, if they have a child with type O blood?
a)
BO
b)
BB
c)
OO
d)
type B
11.
What proportion of the offspring in Figure 11-4 would be expected to have white, smooth hair?
a)
9/16
b)
3/16
c)
4/16
d)
1/16
12.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
13.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
14.
Humans have how may chromosomes ?
a)
112
b)
46
c)
8
d)
67
15.
What do half colored symbols represent?
a)
The individual is a carrier (heterozygous).
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
16.
Females have ____ and males have _____ chromosomes.
a)
XX, XY
b)
XY, XX
c)
XX, XX
d)
XY, XY
17.

What goes in box 3

a)

Aabb

b)

AABB

c)

AAbb

d)

aaBb

18.

What are the blood types of the possible children that a woman (type O) and man (type AB) can have?

a)

O and AB

b)

O and A

c)

O and B

d)

A and B

19.

If black and white are incompletely dominant in a chicken, then what is the phenotype of the offspring of a black chicken with a white chicken?

a)

black

b)

white

c)

grey

d)

black with white spots.

20.

If black and white are codominant in a chicken, then what is the phenotype of the offspring of a black chicken with a white chicken?

a)

black

b)

white

c)

grey

d)

black with white spots.

21.

The diagram shows the process of crossing over. Which claim about crossing over in chromosomes is best supported by the diagram?

a)

Crossing over increases genetic diversity through deletion.

b)

Crossing over decreases genetic diversity through mutation.

c)

Crossing over increases genetic diversity by creating new combinations of genes.

d)

Crossing over decreases genetic diversity by inserting nucleotides into gene sequences.

22.

What is the mutation in this persons chromosomes?

a)

There is only one X

b)

7 is shaped like a hockey stick

c)

There's an extra 21

d)

1 is too curved

23.

What is called when a organism has two alleles that are the same (identical) for a trait. TT or tt. RR or rr

a)

Heterozygous

b)

Homozygous

c)

Domozygous

d)

Thermozygous

24.

Hemophilia is a sex-linked recessive disorder. Which of the following is the genotype for someone who is considered a carrier of Hemophilia?

a)

XHXH

b)

XhXh

c)

XHXh

d)

XHY

25.

If a DNA sequence is mutated it will be passed on to offspring in ....

a)

Gametic Cells

b)

Somatic Cells

c)

parents who have been exposed to harmful substances

26.

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R Y ?

a)

male with white eyes

b)

female with red eyes

c)

male with red eyes

d)

female with white eyes

27.

An example of a chromosomal mutation would be when ...

a)

a nucleotide is substituted in a DNA sequence

b)

a nucleotide is deleted in a DNA sequence

c)

a nucleotide is inserted in a DNA sequence

d)

an entire chromosome is added to a chromosome set

28.

The Karyotype shown above is ...

a)

Normal for a male

b)

Normal for a female

c)

Abnormal for a male

d)

Abnormal for a female

29.

The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols express the dominant trait. Based on the pedigree, what are the genotypes for Individuals I-1 and I-2?

a)

I-1: aa I-2: Aa

b)

I-1: AA I-2: Aa

c)

I-1: Aa I-2: aa

d)

I-1: aa I-2: AA

30.

On a Pedigree, what does a filled in square represent?

a)

Not affected Female

b)

Not affected Male

c)

Affected Male

d)

Affected Female

31.
How many cell divisions does meiosis have?
a)
1
b)
2
c)
4
d)
0
32.
The likely cause of genetic disorders is...
a)
Nondisjunction
b)
Overfertilization
c)
Uncontrolled Meiosis
d)
Translocation
33.
How many chromosomes are in a typical human somatic cell?
a)
23
b)
22
c)
44
d)
46
34.

Albinism is an autosomal recessive condition. Which circle graph shows the genotype probability when an albino female mates with a male that is heterozygous for the albinism trait?

a)
b)
c)
d)
35.

Differences in traits such as hair texture are determined by differences in -

a)

the location of sugar groups in DNA

b)

the sequence of nucleotides in DNA

c)

the number of nitrogenous bases in DNA

d)

the molecules attached to the phosphate in DNA

36.

In Holstein cattle the allele for black hair (B) is dominant over the allele for red hair color (b), and the allele for polled (P), or lacking horns, is dominant over the allele for having horns (p).


What is the expected phenotypic ratio of the offspring of a BbPp x BbPp cross if these alleles sort independently?

a)

16 black/polled : 0 black/horned : 0 red/polled : 0 red/horned

b)

12 black/polled : 0 black/horned : 0 red/polled : 4 red/horned

c)

4 black/polled : 4 black/horned : 4 red/polled : 4 red/horned

d)

9 black/polled : 3 black/horned : 3 red/polled : 1 red/horned

37.

During meiosis, homologous chromosomes exchange genetic material. This exchange of genetic material —

a)

increases the genetic variation

b)

reduces the diploid number to the haploid number

c)

increases the haploid number to the diploid number

d)

reduces the probability of mutations

38.

Each strand of a DNA molecule contains nitrogenous bases that pair with other nitrogenous bases in very specific ways. A diagram of a section of DNA is shown.


Which DNA strand is complementary to the one shown above?

a)
b)
c)
d)
39.
____ is the activation of a gene that results in transcription.
a)
Gene expression
b)
Gene technology
c)
Eukaryotic expression
d)
Prokaryotic expression
40.

Gene Regulation can be influenced by environmental factors.

a)

True

b)

False

41.

Scientists have adapted a tool for genetic modification known as CRISPR-Cas9 that can activate or deactiviate genes to _______ DNA and control gene expression.

a)

build

b)

edit

c)

destroy

d)

synthesize

42.

Which statement is best supported by the phenotypes of the offspring and the information provided in the image.

a)

All offspring in F1 are male

b)

All offspring in F1 cannot reproduce

c)

The offspring are the results of a dihybrid cross

d)

All the offspring are the result of a mutation

Similar Resources on Wayground

Genetics Review

40 questions

Genetics Review

quiz

Worksheet

•

8th - 10th Grade

Evolution Practice Quiz

45 questions

Evolution Practice Quiz

quiz

Worksheet

•

9th - 12th Grade

Evolution and QA review

45 questions

Evolution and QA review

quiz

Worksheet

•

9th - 10th Grade

IGCSE - Inheritance

40 questions

IGCSE - Inheritance

quiz

Worksheet

•

9th - 10th Grade

AP Bio Evolution Review

41 questions

AP Bio Evolution Review

quiz

Worksheet

•

9th Grade

1st Semester Biology Review

47 questions

1st Semester Biology Review

quiz

Worksheet

•

9th Grade

Genetics Terminology Quiz

45 questions

Genetics Terminology Quiz

quiz

Worksheet

•

9th Grade

Unit 4 (Cell Cycle, Mitosis vs. Meiosis, Punnett Squares)

40 questions

Unit 4 (Cell Cycle, Mitosis vs. Meiosis, Punnett Squares)

quiz

Worksheet

•

9th Grade