wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Regular Biology Unit 6-Classical Genetics Review

Total questions: 57

Worksheet time: 44mins

Name
Class
Date
1.

Homozygous recessive genotype

a)

Aa

b)

aa

c)

AA

2.

Heterozygous genotype

a)

Aa

b)

aa

c)

AA

3.

Homozygous dominant genotype

a)

Aa

b)

aa

c)

AA

4.

In pea plants, yellow peas are dominant to green. What is the phenotype for a heterozygous pea plant?

a)

Yellow

b)

Green

5.

Hybrid genotype is also known as...

a)

Homozygous

b)

Heterozygous

6.

Purebred genotype is also known as...

a)

Homozygous

b)

Heterozygous

7.

A recessive allele will always be "hidden" by a dominant allele.

a)

Mendel's Law of Dominance

b)

Mendel's Law of Independent Assortment

c)

Mendel's Law of Segregation

8.

Allele pairs separate from one another during gamete formation.

a)

Mendel's Law of Dominance

b)

Mendel's Law of Independent Assortment

c)

Mendel's Law of Segregation

9.

Organisms inherit two copies of genes, one from each parent, and organisms donate only one copy of each gene in their gametes because the genes separate during gamete formation.

a)

Mendel's Law of Dominance

b)

Mendel's Law of Independent Assortment

c)

Mendel's Law of Segregation

10.

Any of the alternative forms of a gene that

occurs at a specific place on a chromosome.

a)

Loci

b)

Chromatid

c)

Gene

d)

Allele

11.

In peas, tall plants are dominant to short plants. What is the probability of having a short plant if you cross two heterozygous parents?

a)

100%

b)

75%

c)

50%

d)

25%

12.

Cross, or mating, between organisms involving

one pair of contrasting traits.

a)

Monohybrid cross

b)

Fertilization

c)

Dihybrid cross

d)

Codominance

13.

Genes located close to each other on a chromosome are more likely to be inherited together.

a)

Chromosomal Theory of Inheritance

b)

Genetic linkage

c)

Loci

d)

Recombination

14.

Chromosome that contains genes for characteristics

NOT directly related to the sex of the organism.

a)

Sex chromosome

b)

Loci

c)

Gene

d)

Autosome

15.

Chromosome that directly controls the development of sexual characteristics.

a)

Autosomes

b)

Genes

c)

Sex chromosomes

d)

Loci

16.

Why are men more likely to inherit sex-linked traits?

a)

Woman have only one of each sex chromosome.

b)

Men have only one of each sex chromosome.

c)

Men have two copies of each sex chromosome.

d)

Woman have two copies of each sex chromosome.

17.

Eye color, hair color, and skin color are polygenic traits. Polygenic traits result from...

a)

recessive genes.

b)

many genes.

c)

codominant genes.

d)

epistatic genes.

18.

In snapdragons purebreeding dominant flowers are red, purebreeding recessive flowers are white, and hybrids are pink. What type of inheritance is this?

a)

Polygenic

b)

Sex-linked

c)

Codominance

d)

Incomplete dominance

19.

In cows and horses fur color is controlled by two dominant alleles, red and white. A hybrid animal will be roan (red and white spots). What type of inheritance is this?

a)

Polygenic

b)

Sex-linked

c)

Codominance

d)

Incomplete dominance

20.

Which is NOT an environmental condition that can influence genes?

a)

Mutations

b)

Temperature

c)

UV radiation

d)

Soil acidity

21.

Failure of chromosomes to separate during meiosis, can lead to disorders such as Down's syndrome.

a)

Incomplete dominance

b)

Mutations

c)

Epistasis

d)

Nondisjunction

22.

Which type of inheritance is shown in this photo?

a)

Sex-linked

b)

Dominant

c)

Recessive

d)

Incomplete

23.

Which type of inheritance is shown in this photo?

a)

Sex-linked

b)

Dominant

c)

Recessive

d)

Incomplete

24.

Which type of inheritance is shown in this photo?

a)

Sex-linked

b)

Dominant

c)

Recessive

d)

Incomplete

25.

Hemophilia is a sex-linked recessive disorder. A normal man marries a carrier woman. What is the likelihood of having a son with hemophilia?

a)

100%

b)

75%

c)

50%

d)

25%

26.

In rats, yellow fur is incompletely dominant to white. What is the genotypic ratio if you cross a cream rat with a white rat?

a)

4 : 0

b)

1 : 2 : 1

c)

2 : 2

27.

As a woman ages, what happens to her chances of having a child with a chromosomal disorder?

a)

Increases

b)

Decreases

c)

Stays the same.

28.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
29.
B = brown fur  b = white fur
In the Punnett square, what is the probability for white fur? 
a)
0%
b)
25%
c)
50%
d)
75%
30.
In the Punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
31.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
32.
B - black, b - brown.  Two black mice mate and have some black and some brown mice.  What is the genotype of the parents?
a)
BB x Bb
b)
BB x bb
c)
Bb x Bb
d)
Bb x bb
33.
What ratio of the offspring from the cross shown will be homozygous recessive for the  trait of tallness? 
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
34.
What are the possible genotypes for this cross?
(Click the picture to see it without the text)
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
35.
In the Punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
36.
B = brown fur  b = white fur
In the Punnett square, what is the probability for white fur? 
a)
0%
b)
25%
c)
50%
d)
75%
37.
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?
a)
25%
b)
0%
c)
100%
d)
50%
38.
Purple (P) is dominant to the white (p).
According to the Punnett Square, what is the probability of an offspring being purple?
a)
25%
b)
0%
c)
100%
d)
50%
39.
What is the dominant trait?
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
40.
What is the genotypic ratio here?
a)
25% blue eye 75 % brown eye 
b)
BB = 25% Bb = 50% bb = 25%
c)
BB= 50 % bb = 50%
d)
All brown eye
41.
What does a Punnett Square do?
a)
tell you exactly what your offspring will look like
b)
increase the chance you pass on recessive traits
c)
predict genotypes and phenotypes in offspring
d)
have no purpose but for Taylor to give us extra assignments
42.
Which of the following is homozygous dominant?
a)
Jj
b)
Rr
c)
MM
d)
ee
43.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
44.

______________ is when a plant pollinates with itself.

a)

Self-fertilization

b)

Cross-fertlization

c)

Monohybrid cross

d)

Hybridization

45.

__________ is when pollen from one flower fertilizes the eggs in the flower of different flower.

a)

Cross-fertilization

b)

Self-fertilization

c)

Monohybrid cross

d)

Hybridization

46.

In peas, tall plants (T) are dominant to short plants (t). In the P generation, a purebreeding tall plant is crossed with a short plant. The F1 generation is then allowed to self-pollinate. What's the probability of having a homozygous dominant (TT) plant in the F2 generation?

a)

100%

b)

75%

c)

50%

d)

25%

e)

0%

47.

CROSSING OVER INCREASES

a)

LIFE SPAN

b)

GENETIC VARIATION

c)

THE NUMBER OF OFF-SPRING

d)

ALL ARE TRUE

48.

WHAT TYPE OF CELLS STORE THE GENETIC INFORMATION THAT IS PASSED TO OFF-SPRING

a)

BODY CELLS

b)

MITOSIS

c)

EGG

d)

SPERM

e)

EGG AND SPERM

49.

MEIOSIS

a)

REDUCES THE NUMBER OF CHROMOSOMES BY ONE HALF

b)

PRODUCES UNIQUE SEX CELLS-1N

c)

ALLOWS TRAITS TO BE PASSED TO OFFSPRING

d)

ALL ARE TRUE

e)

INCREASE GENETIC VARIATION

50.

MEIOSIS PRODUCES 4 CELLS-THE CHROMOSOME NUMBER IS ...

a)

DIPLOID

b)

HAPLOID

51.

NORMAL HUMANS HAVE 46 CHROMOSOMES, HOW MANY WILL THE GERM CELLS HAVE AFTER MEIOSIS?

a)

46

b)

23

c)

12

d)

92

52.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
53.
Which letter(s) in the diagram correspond to cells that are haploid? 
a)
A
b)
B
c)
C
d)
A and B
54.
Compared to the number of chromosomes contained in a body cell, how many chromosomes would normally be contained in a gamete?
a)
The same number
b)
One-fourth as many
c)
Twice as many
d)
Half as many
55.
What is one of the advantages, why is it better to reproduce sexually versus asexually?
a)
survival of the fittest
b)
overproduction
c)
genetic variation
d)
cloning
56.

What are the main sources of variation?

a)

random fertilization

b)
crossing over of chromosomes
c)

independent assortment

d)

all choices are correc

57.
Females have ____ and males have _____ chromosomes.
a)
XX, XY
b)
XY, XX
c)
XX, XX
d)
XY, XY

Similar Resources on Wayground

SEE Semester Final Review

60 questions

SEE Semester Final Review

quiz

Worksheet

•

9th - 10th Grade

Honors Genetics Review

60 questions

Honors Genetics Review

quiz

Worksheet

•

9th - 10th Grade

Animal & Plant Science (Ag Certification Practice 2)

60 questions

Animal & Plant Science (Ag Certification Practice 2)

quiz

Worksheet

•

9th - 12th Grade

Unit 4 - The Cell, Cell Theory, Organelles, Microscopes 24-25

57 questions

Unit 4 - The Cell, Cell Theory, Organelles, Microscopes 24-25

quiz

Worksheet

•

9th Grade

HBS: 3.3 Oxygen Quiz

56 questions

HBS: 3.3 Oxygen Quiz

quiz

Worksheet

•

KG - University

U6L2: Protein Synthesis

57 questions

U6L2: Protein Synthesis

quiz

Worksheet

•

9th - 10th Grade

Evolution Review Game

59 questions

Evolution Review Game

quiz

Worksheet

•

9th Grade

Semester Exam

57 questions

Semester Exam

quiz

Worksheet

•

9th - 12th Grade