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genetics

Total questions: 28

Worksheet time: 26mins

Name
Class
Date
1.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
2.
What is one advantage of sexual reproduction?
a)
offspring are identical to parents
b)
offspring are resistant to viruses
c)
offspring are born live, rather thna from eggs
d)
offspring inherit a wider variety of genetic information
3.
What is a phenotype?
a)
The expression of a trait; what you see.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
4.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
5.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
6.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
7.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
8.

In a DNA molecule, nucleotides are linked together to make up a single strand of DNA then bonded to a second strand. This structure is known as a

a)

RNA

b)

double helix

c)

watson-crick

d)

double nucleotide

9.

During meiosis, one parent cell gives rise to how many daughter cells?

a)

1

b)

2

c)

3

d)

4

10.

Human gametes contain how many chromosomes?

a)

46

b)

23

c)

12

d)

28

11.

Hair color, height, eye color and freckles are examples of human traits. What do we call the physical expression of the genetic material of an organism?

a)

genetics

b)

heredity

c)

genotype

d)

phenotype

12.

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?

a)

0%

b)

25%

c)

50%

d)

75%

13.

If a black guinea pig (BB) and a white guinea pig (bb) mate, there is a ______ chance that a white guinea pig will be born.

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

14.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
15.

A mutation is harmful to an organism if it

a)

changes the phenotype of an organism

b)

changes the DNA segment

c)

reduces the organism's chance of survival

d)

makes the organism better able to avoid predators

16.

Who studied different characteristics of pea plants by cross-pollinating plants?

a)

Gregor Mendel

b)

Albert Punnett

c)

Sir Isaac Newton

d)

David Kuster

17.

A mutation is

a)

any change that is harmful

b)

any change in a gene or chromosome

c)

any change that is helpful

d)

any change in the phenotype

18.

What is the first phase of Mitosis?

a)

Prophase

b)

Anaphase

c)

Metaphase

d)

Telophase

19.

What phase of mitosis is occuring in the picture?

a)

Prophase

b)

Metaphase

c)

Telophase

20.

Name the phase:

a)

Prophase

b)

Anaphase

c)

Metaphase

d)

Telophase

21.

Fruit fly body cells have 8 chromosomes. After mitosis, you would expect a resulting fruit fly daughter cell to have -

a)

16 chromosomes.

b)

8 chromosomes.

c)

46 chromosomes.

d)

4 chromosomes.

22.

The process of crossing over occurs in what phase of meiosis?

a)

anaphase 1

b)

prophase 2

c)

prophase 1

d)

telophase 1

23.

Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.

a)

23, 46

b)

2, 4

c)

46, 23

d)

50, 100

24.
Which one of the following shows discontinuous variation?
a)
Eye colour
b)
Height
c)
Strength
d)
Weight
25.
Differences between members of the same species are called
a)
predators
b)
traits
c)
selections
d)
variations
26.
Which one of the following shows continuous variation?
a)
Blood group
b)
Height
c)
Male or female
d)
Tongue rolling
27.
What type of graph do we use for discontinuous variation?
a)
A bell-shape
b)
Bar chart
c)
Line graph
d)
Scatter Graph
28.
Which of the following is an example of discontinuous variation?
a)
Weight
b)
blood type
c)
height
d)
Hand span

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