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WorksheetsB6 Revision
Total questions: 20
Worksheet time: 12mins
Name
Class
Date
1.
How many pairs of chromosomes do humans have?
a)
10
b)
23
c)
11
d)
15
2.
The part of a chromosome that carries information for a certain trait is called a
a)
protein
b)
gene
c)
nucleus
d)
gametes
3.
Which sentence is FALSE?
a)
Humans have 23 pairs of DNA.
b)
Humans have 46 total chromosomes.
c)
Genes are made of chromosomes.
d)
Every human's DNA is at least 99% similar.
4.
Which of these is an example of inherited variation only?
a)
Eye colour
b)
Height
c)
Weight
d)
Skin colour
5.
Survival of the Fittest and Evolution were proposed by what scientist?
a)
Charles Darwin
b)
Albert Einstein
c)
Steven Hawking
d)
Isaac Newton
6.
Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)
a)
Variation
b)
Adaptation
c)
Behavior
d)
Environment
7.
What is the advantage of having different shaped beaks?
a)
To look different from other species.
b)
To be able to eat the food readily available in the environment.
c)
To protect itself against predators.
d)
To protect itself against prey.
8.
The theory of evolution by natural selection means that what is changing over time?
a)
The inherited traits of a population.
b)
The acquired traits of a population.
c)
Hair color and eye color
d)
Attractive features.
9.
What method of birth control is 100% effective?
a)
Condoms
b)
Abstinence
c)
Tubal ligation
d)
Birth control pill
10.
What method of contraception is the male condom?
a)
Hormonal
b)
Barrier
c)
Sterilization
d)
Chemical
11.
What method disrupts the implantation of the fertilized egg on the wall of the uterus?
a)
IUD
b)
condom
c)
pill
d)
diaphragm
12.
Which of the following is a disadvantage for sexual reproduction?
a)
a lot of time and energy is required for making gametes and finding mates
b)
offspring can be produced more quickly than by asexual means
c)
the genetic diversity makes organisms respond differently to environmental changes
d)
the offspring are genetically different
13.
function of mitosis
a)
genetic diversity though sexual reproduction
b)
cell reproduction and general growth and repair
14.
Asexual reproduction can produce which offspring?
a)
Diverse offspring
b)
Both diverse and uniform offspring
c)
Uniform offspring
d)
Asexual offspring
15.
which of the following does not occur by mitosis?
a)
growth
b)
production of gametes
c)
repair
d)
development in the embryo
16.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
17.
The transfer of a gene from the DNA of one organism into another organism in order to produce an organism with desired traits.
a)
Genetic Engineering
b)
Karyotype
c)
Pedigree
d)
Genome
18.
The process of selecting a few organisms with desired traits to serve as parents of the next generation.
a)
Gene Therapy
b)
Genome
c)
Selective Breeding
d)
Pedigree
19.
The purpose of selective breeding is to
a)
Get bigger animals
b)
get smaller animals
c)
create animals with desirable traits
d)
create animals with bad traits
20.
The diagram shows a population of ladybugs that changed over 15 years. What is the most likely explanation for this change?
a)
Wings are an advantageous (good) trait.
b)
Black spots are an advantageous (good) trait.
c)
Yellow coloring is an advantageous (good) trait.
d)
Red coloring is an advantageous (good) trait.
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