Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

1st 9 Weeks 8th Grade Science

Total questions: 55

Worksheet time: 29mins

Name
Class
Date
1.

_________ reproduction involves 2 parent cells, a sperm and an egg.

a)

Sexual

b)

Asexual

2.

______ reproduction involves 1 parent organism duplicating itself (copying)

a)

Sexual

b)

Asexual

3.

Offspring are identical to the parent

a)

Sexual

b)

Asexual

4.

Offspring are not identical to the parent, but contain genes from both

a)

Sexual

b)

Asexual

5.

This type of reproduction produces offspring that are unique or different from the parents and siblings

a)

Sexual

b)

Asexual

6.

This type of reproduction produces offspring quicker.

a)

Sexual

b)

Asexual

7.

This type of reproduction requires more time and energy.

a)

Sexual

b)

Asexual

8.

The hydra in the picture produces a bud that is a copy of itself. When mature, the bud will fall off and be a new organism.

a)

Sexual

b)

Asexual

9.

Bacteria will produce offspring by dividing in half during binary fission.

a)

Sexual

b)

Asexual

10.

Males will pass DNA to sperm cells, and females will pass their DNA to egg cells to produce an offspring.

a)

Sexual

b)

Asexual

11.
The female sex cell
a)
sperm cell
b)
egg cell
c)
sex cell
d)
female cell
12.

A sperm and an egg join together in a process called

a)

mitosis

b)

meiosis

c)

fertilization

d)

fission

13.

___________ reproduction has the advantage of increasing genetic variation.

a)

Sexual

b)

Asexual

c)

Fission

d)

Budding

14.

Sex cells are produced by _____________.

a)

photosynthesis

b)

zygotes

c)

meiosis

d)

mitosis

15.

Organisms produced by asexual reproduction are genetically different from the parent organism.

a)

False

b)

True

16.

An exact copy of a cell/organism is produced...

a)

Mitosis

b)

Meiosis

17.

Brown Bears reproduce sexually, so all the baby bears are...

a)

different.

b)

the same.

18.

Identical copies are most related to...

a)

Mitosis and Sexual Reproduction

b)

Meiosis and Asexual Reproduction

c)

Mitosis and Asexual Reproduction

d)

Meiosis and Sexual Reproduction

19.
a)
Mitosis
b)
Meiosis
20.
A human usually has ______ chromosomes in their body cells.
a)
6
b)
22
c)
4
d)
46
21.
How many daughter cells are produced at the end of mitosis?
a)
1
b)
2
c)
3
d)
4
22.
How many chromosomes are in the new cells of mitosis?
a)
46
b)
23
23.
The purpose of sexual reproduction and meiosis is to form ________ cells.
a)
body
b)
sex
c)
somatic
d)
brain
24.
How many daughter cells are produced at the end of meiosis?
a)
1
b)
2
c)
3
d)
4
25.
How many chromosomes are in the new cells of meiosis?
a)
46
b)
23
26.

At the end of mitosis you have _____ cells.

a)

identical

b)

different

c)

identical twins

d)

variety

27.

The products of meiosis are genetically...

a)

different.

b)

identical.

28.

Identify a purpose of mitosis. Select all that apply.

a)

Produce gametes for reproduction.

b)

Repair damaged or dead cells.

c)

Reduce the chromosome number.

d)

Growth of organisms from birth to adulthood.

29.

Suppose a diploid animal cell has 16 chromosomes. How many chromosomes would a sex cell of this animal have

a)

16

b)

8

c)

32

d)

23

30.

All cells in your body have genetic information (the code found within DNA). Sex cells (egg and sperm) have ________________ the amount of genetic information when compared to the body cells in your body

a)

twice

b)

equal

c)

half

d)

four times

31.

In which phase does crossing-over happen?

a)

Prophase I

b)

Prophase II

c)

Metaphase I

d)

Anaphase II

32.

What phase is this?

a)

Prophase I

b)

Metaphase II

c)

Anaphase I

d)

Telophase II

33.

What phase is this?

a)

Metaphase I

b)

Prophase II

c)

Telophase I

d)

Anaphase II

34.

What phase is this?

a)

Metaphase II

b)

Prophase I

c)

Telophase I

d)

Anaphase II

35.

What phase is this?

a)

Metaphase II

b)

Prophase I

c)

Telophase I

d)

Anaphase I

36.

What phase is this?

a)

Telophase II

b)

Anaphase II

c)

Telophase I

d)

Anaphase I

37.

What phase is this?

a)

Anaphase II

b)

Telophase I

c)

Telophase II

d)

Anaphase I

38.

Which term describes the different forms of a gene

a)

Chromosome

b)

Allele

c)

DNA

d)

Punnett Squares

39.

Aa, DD, Bb, yy are all examples of _______

a)

genotypes

b)

phenotypes

40.

A person who breeds animals keeps careful records of the fur color of parents and offspring from each generation. The fur color is a trait transferred from generation to generation.


What are the structures that carry the information for these traits called?

a)

organelles

b)

genes

c)

muscles

d)

cytoplasm

41.

Which of the following is a heterozygous genotype?

a)

FF

b)

Dd

c)

ss

d)

UU

42.

What is a phenotype?

a)

An observable characteristic

b)

The combination of alleles

c)

The sister chromatids

d)

The location of a gene on a chromosome

43.

What is this genotype considered?

(GG)

a)

Heterozygous

b)

Homozygous recessive

c)

Heterozygous Dominant

d)

Homozygous Dominant

44.

Which is the homozygous recessive genotype?

a)

QQ

b)

Ee

c)

bb

d)

Blonde Hair

45.

What is this considered?

(Brown Eyes)

a)

A genotype

b)

Genetic Makeup

c)

An allele

d)

A phenotype

46.

If you crossed two heterozygous parents with one another (Qq). What are the chances of having an offspring that is homozygous recessive?

a)

50%

b)

100%

c)

25%

d)

75%

47.

What is an allele?

a)

An observable characteristic.

b)

The phenotype of an organism.

c)

A location on a genome.

d)

Different variations of a gene.

48.

A person who is homozygous for a trait can have a genotype of....

a)

AA, Aa

b)

Aa, aa

c)

AA, aa

d)

aa

49.

If a person is heterozygous for a trait, their genotype can be...

a)

Aa

b)

AA, aa

c)

AA, Aa

d)

AA

50.

If "B" represents brown hair, and "b" represents blond hair, what will the genotype be for a homozygous brown haired person?

a)

BB

b)

Bb

c)

bb

51.

P= purple petals and p= white petals. What genotype(s) would result in purple petals?

a)

pp

b)

Pp, pp

c)

PP, Pp

d)

PP, pp

52.

How many copies of the recessive gene must there be for that phenotype to show up?

a)

1

b)

2

c)

3

d)

4

53.

What is the missing pairing?

a)

AA

b)

Aa

c)

aa

54.

An allele that is hidden whenever the dominant allele is present.

a)

recessive

b)

dominant

c)

allele

d)

gene

55.

What percentage of Susie's kids will have blue eyes if she is homozygous recessive and dad is heterozygous dominant?

B= dominant brown eyes

b= recessive blue eyes

a)

10%

b)

25%

c)

50%

d)

75%