Free Printable Genetics Unit Review

Worksheets

Genetics Unit Review

Total questions: 50

Worksheet time: 3585secs

Name

Class

Date

A Punnett square shows all of the following EXCEPT -

all possible results of a genetic cross.

the genotypes of the offspring.

the alleles in the gametes of each parent.

the actual results of a genetic cross.

How many different allele combinations would be found in the gametes produced by a pea plant whose genotype was RRYy?

(a)

What kind of inheritance has occurred if two alleles blend together?

Simple dominance

Incomplete dominance

Polygenic inheritance

Codominance

When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited

one allele from each parent

two alleles from each parent

three alleles from each parent

four alleles from each parent

What principle states that the inheritance of one pair of genes does not affect the inheritance of another pair?

principle of dominance

principle of independent assortment

principle of probabilities

principle of segregation

A trait is a specific characteristic that can vary form one individual to another

True

False

Due to the process of segregation, alleles separate during the production of (a)

Variation in eye color is an example of -

incomplete dominance

codominance

multiple alleles

polygenic inheritance

The physical expression of a genetic trait is called a

mutation

genotype

crossing over

phenotype

10.

Which of the following traits of a dog is inherited from its parents?

the presence of fleas in its fur

the color of its fur

the ability to sit up and beg

the habit of barking to go outside

11.

having two of the same genes for the trait (sometimes called purebred).

homozygous

hetrozygous

protein

chromosome

12.

having two different genes for a trait (sometimes called hybrid).

protein

homozygous

heterozygous

genotype

13.

Why can males not be carriers for many sex-linked traits?

Because males are more affected by diseases

Because males only have 1 X chromosome and whatever allele it carries is what they are (they can't be heterozygous)

Because females can overcome diseases regardless of their genes

14.

Blood type: Match the following genotypes to the correct phenotypes

Type O

I^Ai, I^AI^A

Type A

I^BI^B, I^Bi

Type B

I^AI^B

Type AB

15.

When we say that a woman is a carrier for a genetic disease or disorder it means that

she has 1 allele, but not the disorder

she has 2 allele for the disorder

she can pass the allele only to male children

she can pass the allele only to female children

16.

Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?

X^NXⁿ

XⁿXⁿ

X^NX^N

XⁿY

17.

Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?

X^NXⁿ

XⁿXⁿ

X^NY

XⁿY

18.

A man with type O blood is accused of being the father of a type B baby. The mother is type A. Could this man be the father?

Yes

19.

Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?
AA x aa

brown fur

20.

A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?

25%

50%

100%

21.

What type of inheritance do two alleles have if their traits blend together?

Incomplete Dominance

Co-Dominance

22.

This is an example of ___________?

Incomplete dominance

Co-Dominance

23.

this image is an example of

codominance

dominance

incomplete dominance

24.

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

Incomplete Dominance

Co dominance

Independent assortment

Recessive inheritance

25.

If the offsprings have the blood groups O and A the genotype of parents would be

I^AI^A and I^Ai

I^A i and ii

I^AI^A and I^AI^A

I^A i and I^Bi

26.

What is the blood type of parent 1?

(a)

27.

If a person has type A blood, the phenotype is A. What can the genotype be?

I^BI^B or I^Bi

I^AI^A or I^Ai

I^AI^B

28.

If a person has type O blood, the phenotype is O. What can the genotype be?

I^BI^B or I^Bi

I^AI^A or I^Ai

I^AI^B

29.

A man with type O blood has children with a woman who is heterozygous for type A blood. What is the probability that their children will have type A blood?

25%

50%

75%

30.

An example of polygenic inheritance is...

Skin Color

hitch hikers thumb

blood types

31.

1. In a certain species of animal, black fur (B) is dominant over tan fur (b).
Which type of dominance does this cross show?

Complete Dominance

Incomplete Dominance

Codominance

Polygenic Inheritance

32.

Snapdragon flowers come in red, pink and white. What type of inheritance is this?

Complete Dominance

Incomplete Dominance

Codominance

Polygenic Inheritance

33.

If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed-what percentage of the offspring would be homozygous white?

25%

50%

75%

34.

What percentage of the female offspring will be a carrier for this recessive disease?

50%

100%

25%

35.

Chromosome that is not a sex chromosome

Chromosome

Autosome

Sex Chromosome

Homologous pair

36.

What did Gregor Mendel use to discover the principles that rule heredity?

Pea Plant

Pigeons

Pear trees

Photosynthesis

37.

What did Mendel call the two kinds of traits exhibited by the pea plants (one coming from the father, one from the mother)?

Genesis

Elective traits

Alleles

Quadrants

38.

What do we call the table used to calculate the probability of an offspring's genotype?

Punnett square

Venn diagram

Golden ratio

Fibonacci sequence

39.

This type of phenotype is less likely to be prominent in offspring

Dominant genotype

Recessive genotype

Dominant phenotype

Recessive phenotype

40.

Gregor Mendel is known as the father of _________

Modern Medicine

the Green Revolution

Genetics

the Pea Plant Man

41.

In guinea pigs Black fur (B) is dominant to white fur (b) cross a white guinea with a heterozygous one,what is the genotypic ratio?

2:2

1:2:1

0:2:2

2:0:2

42.

In pea plants Tall stems (T)are dominant to short stems (t) cross a homozygous tall plant with a homozygous recessive plant, what is the phenotypic ratio

4:0

2:2:0

0:4

0:2:2

43.

If green is dominant over purple, then what is the genotype for this individual?

Purple

Green

44.

Having two different alleles for a trait (example Hh):

homozygous

heterozygous

dominant

purebred

45.

What are the possible genotypes for this cross?

TT = 25% Tt= 50% tt=25%

all tall

TT= 75% tt = 25%

Tt = 100%

46.

T - tall and t = short

In the punnett square below, what belongs in the missing square

47.

If a homozygous dominant allele (AA) is crossed with a homozygous recessive allele (aa), all of the resulting offspring will be

Homozygous dominant

Heterozygous

Homozygous Recessive

48.

What allele combination should go in the missing box?

none of these

49.

B = brown fur b = white fur

In the punnett square, what is the probability for white fur?

25%

50%

75%

50.

This is an example of _____________.

phenotype

heliotype

DNA

genotype

Reset

Genetics Unit Review

Total questions: 50

Worksheet time: 3585secs

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