Free Printable Study Guide For Science Test

1.

What is the passing of traits from parent to offspring?

a)

pollination

b)

heredity

c)

pure breeding

d)

cell fusion

2.

Which of the following is an example of a trait?

a)

your hair length

b)

your hair style

c)

naturally curly hair

d)

color-dyed hair

3.

John has a genotype of EE for earlobe shape. What is another way to describe this genotype?

a)

hybrid

b)

heterozygous

c)

homozygous dominant

d)

homozygous recessive

4.

What happens to a recessive allele (e) when a dominant allele (E) is present? (assume complete dominance)

a)

neither trait will show

b)

the recessive trait will show

c)

the recessive trait will not show

d)

both the recessive and dominant traits will show

5.

Genes contain information for each of your traits. Where are genes located?

a)

mitochondria

b)

alleles

c)

genotype

d)

chromosomes

6.

In cats, there are two types of ears: normal and curly. A curly-eared cat mated with a normal-eared cat and all of the kittens had curly ears. What type of trait are curly ears?

a)

dominant

b)

recessive

c)

co-dominant

d)

incomplete dominant

7.

Jack and Jill were brother and sister, but didn't look alike at all. Jack had attached earlobes (recessive) and Jill had free earlobes (dominant). Jill knew one parent was pure recessive for earlobe shape and the other was heterozygous, so she drew the following Punnett square:

In the Punnett square, the two letters Ee are an example of what?

a)

DNA

b)

a trait

c)

a genotype

d)

a phenotye

8.

Jack and Jill were brother and sister, but didn't look alike at all. Jack had attached earlobes (recessive) and Jill had free earlobes (dominant). Jill knew one parent was pure recessive for earlobe shape and the other was heterozygous, so she drew the following Punnett square:

What type(s) of earlobes do Jill's parents have?

a)

Both parents have free earlobes.

b)

Both parents have attached earlobes.

c)

One parent has attached earlobes and one parent has free earlobes.

d)

Not enough information is given.

9.

Jack and Jill were brother and sister, but didn't look alike at all. Jack had attached earlobes (recessive) and Jill had free earlobes (dominant). Jill knew one parent was pure recessive for earlobe shape and the other was heterozygous, so she drew the following Punnett square:

What is the probability of offspring with attached earlobes like Jack?

a)

25%

b)

50%

c)

75%

d)

100%

10.

Jack and Jill were brother and sister, but didn't look alike at all. Jack had attached earlobes (recessive) and Jill had free earlobes (dominant). Jill knew one parent was pure recessive for earlobe shape and the other was heterozygous, so she drew the following Punnett square:

Jack's earlobes were different than Jill's. Which of these answers explains how this happened?

a)

Jack got one recessive gene from each parent.

b)

Jack got one dominant gene from each parent.

c)

Jack got one dominant gene from one parent and one recessive gene from the other parent.

d)

Jack didn't inherit his earlobe shape from his parents. He got his earlobes from his grandma.

11.

A cat has six toes on each paw. Extra toes are a recessive trait (d) for cats. The cat mates with a heterozygous cat with the normal number of toes (D). Complete a Punnett square for this cross. What fraction of the cats' offspring would have extra toes?

a)

one-fourth

b)

one-half

c)

three-quarters

d)

all

12.

In pea plants, the allele for green pod color (G) is dominant over the allele for yellow pod color (g).

Which of the following genotypes would a plant with yellow pods have?

a)

GG

b)

Gg

c)

gG

d)

gg

13.

In pea plants, the allele for green pod color (G) is dominant over the allele for yellow pod color (g).

In a cross between a homozygous yellow pod plant and a homozygous green pod plant, what are the phenotypes of the offspring?

a)

all yellow

b)

half yellow, half green

c)

all green

d)

one-quarter yellow, three-quarters green

14.

In pea plants, the allele for green pod color (G) is dominant over the allele for yellow pod color (g).

Two heterozygous plants are cross pollinated, and produce 400 offspring. How many of the offspring would likely be green?

a)

100

b)

200

c)

300

d)

400

15.

In tigers, a recessive allele causes an absence of fur color (a "white" tiger).

If two normally colored tigers that are heterozygous mated, what percentage of their offspring would be white?

(Hint: you may want to complete a Punnett square; choose an appropriate letter to represent fur color)

a)

25%

b)

50%

c)

75%

d)

100%

16.

Steven went to a farm and picked a bright red tomato from a broken branch on the plant. The tomato had a rotten spot with a worm inside of it. Instead of eating the tomato, Steven decided to plant the seeds and grow new tomato plants.

Which characteristic of the tomato plant is inherited and could change over several generations?

a)

color of the skin

b)

size of rotten spots

c)

length of worms inside

d)

number of broken branches

17.

Genetic Engineering in corn allows genes from bacteria to be added to the genetic material of corn. In traditional breeding, genes of only closely related types of corn can be exchanged. What is one risk of genetically engineering corn plant?

a)

It decreases the amount of pesticide needed to grow corn.

b)

It increases the length of time corn can be stored before it rots.

c)

It increases the chance of adding a trait to corn that causes allergies.

d)

It decreases the number of corn plants a farmer can grow in a season.

18.

If Mary has blue eyes (bb) and both of her parents have brown eyes (Bb), which statement is true?

a)

Mary inherited both genes from her father.

b)

Mary inherited one recessive form the the gene from each parent.

c)

Mary inherited both genes from her mother.

d)

Mary inherited one dominant form of the gene from each parent.

19.

Different forms of a given trait.

a)

alleles

b)

chromosomes

c)

gene

d)

DNA

20.

The chemical that chromosomes are made of.

a)

alleles

b)

gene

c)

DNA

d)

traits

21.

What symbol best represents co-dominance?

a)

RR

b)

dd

c)

Tt

d)

AB

22.

Which of the following would be an example of a phenotype?

a)

TT

b)

heterozygous

c)

blue eyes

d)

pure recessive

23.

Which statement about the genetic traits of humans is true?

a)

Recessive forms of genes are always visible in offspring.

b)

Visible traits are the same for each member of the family.

c)

Dominant forms of genes are always inherited from both parents.

d)

Visible traits depend on the dominant and recessive forms of genes inherited from each parent.

24.

When a pure dominant red flower is crossed with a pure dominant white flower part of both dominant traits show and the flower offspring are pink. This is an example of what type of inheritance?

a)

do-dominance

b)

incomplete dominance

c)

complete dominance

d)

bilingual dominance

25.

SpongeBob has blood type AB and SpongeSusie has blood type O. They have 7 children together. Use the Punnett square provided to determine what percentage of their children will have blood types that are different than either parent.

a)

25%

b)

50%

c)

75%

d)

100%

26.

Two benefits of GM (genetically modified) foods are increased pest/disease resistance and...

a)

increased food supply

b)

introduction of toxins

c)

decreased food supply

d)

introduction of new allergens

27.

A tool used to predict heredity.

a)

a survey

b)

a questionaire

c)

a Punnett square

d)

a pie graph

28.

What must be true of the parents if an offspring displays the recessive gene for a trait?

a)

both parents are homozygous dominant

b)

both parents are heterozygous

c)

one parent is homozygous dominant, the other parent is heterozygous

d)

the parents were both purebred dominant

Study Guide For Science Test

Total questions: 28

Worksheet time: 2hrs 20mins

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