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Life Science Unit Test!

Total questions: 30

Worksheet time: 15mins

Name
Class
Date
1.

What is involved in the process of artificial selection? __________ select animals to breed that create _______ with desired traits.

a)

Humans, offspring

b)

offspring, humans

c)

people, animals

2.

What best describes the influence that parents have on whether or not offspring inherit a genetically inherited trait?

Each parent contributes ________ allele because each parent randomly contributes ______ allele for each _________ that is passed onto offspring.

a)

one,one,gene

b)

gene,one,one

c)

one,gene,one

d)

Mistletoe by: Justin Beiber

3.

A homozygous brown mouse mates with a heterozygous brown mouse. The allele for brown fur (B) is dominant over the allele for tan fur (b). What percentage of the offspring will most likely have brown fur?

a)

75%

b)

25%

c)

50%

d)

100%

4.

The kalanchoe plant reproduces asexually by creating new plants along the margins of its leaves. The chili pepper plant reproduces sexually, which means it can produce peppers that are many different colors and sizes, even though they are growing on the same plant.

What benefit do the offspring of the kalanchoe plant receive that the offspring of the chili pepper plant do not?

a)

Kalanchoe offspring will have the old genetic ability to resist disease as the parent plant

b)

Kalanchoe offspring will have the same genetic ability to resist disease as the parent plant

c)

Kalanchoe offspring will have 40's genetic ability to resist disease as the parent plant

d)

Kalanchoe offspring will have children genetic ability to resist disease as the parent plant

5.

A green-seeded pea plant and a yellow-seeded pea plant have offspring with all yellow seeds. What is the most likely reason?

a)

The genes from brown-seeded parent were dominant.

b)

The genes from green-seeded parent were dominant.

c)

The genes from yellow-seeded parent were dominant.

d)

The genes from seeded-yellow parent were dominant.

6.

Why do children sometimes look very similar to their parents?

a)

Children inherit different of genes from both parents.

b)

Children inherit combinations of genes from both parents.

c)

Children inherit kim kardation of genes from both parents.

d)

Children inherit lots and lots of genes from both parents.

7.

Roses are one of the most commonly sold flowers in the floral community. Their popularity has caused a large increase in the varieties of roses available. What explains how roses could have varying traits when they initially did not?

a)

Selective breeding

b)

Artifical breeding

c)

Asexual breeding

d)

Sexual breeding

8.

Patricia breeds rabbits to sell as pets. She noticed that rabbits with longer, softer ears sell better than those with short ears. Which best describes what Patricia should do to sell the most rabbits?


Patricia should breed the rabbits with _________________ears together.

a)

short and soft

b)

long and itchy

c)

short and itchy

d)

long and soft

9.

What type of breeding will most likely decrease genetic diversity?

a)

selective reproduction

b)

selective breeding

c)

breeding selective

d)

artificial reproduction

10.

Agriculture has used selective breeding for many years to pass on desirable traits to domesticated plants and animals. This is an example of what type of selection? ________________ selection

a)

Selective

b)

Artifical

c)

Humans

d)

Cowboys

11.

Assuming the flowers in this cross display complete dominance, and the allele, R, is dominant for a red pigment and the allele, r, is recessive for a white pigment, what percent of the offspring will have red flowers?

a)

100%

b)

50%

c)

25%

d)

75%

12.

A scientist recently found an invertebrate species living in the deep sea that had never been identified previously. The scientist wants to determine if the species reproduces sexually. Which of the following investigations will help her answer the question?

a)

comparing the genetics of individuals within the population

b)

comparing the chromosomes of individuals within the population

c)

comparing the genes of individuals within the population

d)

comparing the DNA of individuals within the population

13.

The Punnett square above shows the results of a genetic cross. The mother is heterozygous for the trait shown. The father is homozygous recessive for the trait.

What can one predict from the results of the Punnett square?

a)

There is a 75% chance that the offspring will have the same phenotype and genotype as the father.

b)

There is a 50% chance that the offspring will have the same phenotype and genotype as the father.

c)

There is a 25% chance that the offspring will have the same phenotype and genotype as the father.

d)

There is a 100% chance that the offspring will have the same phenotype and genotype as the father.

14.

During the 1800s, Gregor Mendel conducted experiments with pea plants. His work showed that organisms inherit traits from their parents and that some traits are dominant over others. Mendel's work was ignored for a long time because scientists could not explain how traits were carried from one generation to the next. What discovery provided scientists with a way to explain Mendel's work?

a)

Punnet square

b)

square punnett

c)

Aero

d)

Artificial selection

15.

Which of the following is a true description of sexual and asexual reproduction?

________ reproduction involves two parent organisms, but _______ reproduction does not.

a)

Asexual, Sexual

b)

Sexual, sexual

c)

Sexual, Asexual

d)

Asexual, Asexual

16.

How does an offspring produced by asexual reproduction compare to the parent organism?

________ of its genetic information is the same as the parent organism.

a)

None

b)

Some

c)

All

d)

Most

17.

The Punnett square above shows the results of a genetic cross between a heterozygous mother and a homozygous recessive father. What can one conclude from the results of the Punnett square?


There is a __________% chance that the offspring will have the same phenotype and genotype as the father.

a)

25%

b)

50%

c)

75%

d)

100%

18.

A pea plant's seed shape is round. What can be said about this trait?

It is the ______________.

a)

Genotype

b)

Genes

c)

Genetics

d)

Phenotype

19.

If the genotype of an individual is "Yy", what conclusion can be drawn?

The individual is _____________.

a)

Heterozygous

b)

Homozygous

c)

Homosexual

d)

Heterosexual

20.

A homozygous dominant parent and a homozygous recessive parent have offspring. What is true about the offspring?

The offspring are ______________.

a)

Heterozygous

b)

Homozygous

21.

Which of the following is true if an organism can reproduce asexually?

Offspring are genetically ______ to the parent.

a)

Different

b)

kind of thr same

c)

identical

22.

TRUE OR FALSE


Selective breeding refers to the

deliberate mating of two organisms with the intention of producing offspring with desirable traits.

a)

TRUE

b)

FALSE

23.

What is the production of a phenotype that is between two different homozygous parents?

a)

A hybrid

b)

a purebreed

24.

In squirrels, the gene for gray fur (G) is dominant over the gene for black fur (g). If 50% of a large litter of squirrels are gray, what was the most likely parental cross?

a)

Gg x gg

b)

GG x GG

c)

gg x GG

d)

gg x gG

25.

In guinea pigs, the allele for rough fur, R, is dominant over the allele for smooth fur, r. What might be the possible genotype of a guinea pig with rough fur?


The guinea pig can have either a ______ or _______ genotype.

a)

Rr, Rr

b)

RR,Rr

c)

RR,RR

d)

Rr,rr

26.

A cross between a pea plant with alleles YY for yellow seeds is crossed with a pea plant with alleles yy for green seeds produces offspring with yellow seeds. Which of the following statements is true?


The allele Y is _________ over the allele y for seed color.

a)

Recessive

b)

Dominant

27.

The table above describes reproduction that occurred in two different types of organisms.


Which of the following correctly identifies the type of reproduction for each species?

Species A: __________ reproduction; Species B: _________ reproduction

a)

sexual, asexual

b)

asexual, asexual

c)

asexual, sexual

d)

sexual, sexual

28.

The picture shows an animal cell with structures X and Y labeled.


Which of the following best explains the relationship between structures X and Y?

X, chromosomes, are located inside Y, the _____, and these structures store genetic material for the cell.

a)

lysosomes

b)

cell membrane

c)

Mitochondria

d)

Nucleus

29.

Charles has blue eyes and his brother has brown eyes. What is the most likely reason for the difference in the eye color of Charles and his brother?

The trait for eye color is _________ from the _________ and the ________.

a)

Father, mother, inherited

b)

Mother, father, inherited

c)

inherited, mother, father

d)

father, inherited, mother

30.

Where is most of a cell's hereditary information stored?

inside the nucleus, which has ____________ that contain many genes

a)

MERRY CHRISTMAS

b)

Chromosomes

c)

asexual

d)

genetics