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Worksheets7th Grade Review
Total questions: 40
Worksheet time: 26mins
Name
Class
Date
1.
Carrie is studying the genes of two fruit flies in her lab. She knows what alleles they have. She wants to know the potential combination of alleles their offspring could inherit. Which of these choices would help Carrie identify the potential combinations?
a)
a carrier
b)
a pedigree
c)
an allele
d)
a Punnett Square
2.
Which kind of mutation has occurred during the DNA replication shown in the diagram?
a)
substitution
b)
deletion
c)
insertion
d)
transcription
3.
Look at the diagram shown below. Which of these choices gives the correct ratio for the offspring predicted by the diagram?
a)
1 BB : 1 BB
b)
2 BB : 1 Bb
c)
1 BB : 1 Bb
d)
1 BB : 2 Bb
4.
Which of the following is true of a man who is color blind?
a)
he will pass on this allele to all of his children
b)
he inherited one allele for color blindness from his mother
c)
he inherited two alleles for color blindness from his father
d)
he has one allele for color blindness and another allele for normal vision
5.
Look at the diagram below. The alleles for the parents are missing. What are they?
a)
dd and dd
b)
DD and Dd
c)
DD and dd
d)
Dd and dd
6.
Which of the following statements about pedigrees is true?
a)
pedigrees can only be used to trace the occurance of dominant traits
b)
boxes typically represent males and circles typically represent females
c)
pedigrees show all the allele combinations that are possible on a cross
d)
shaded shapes typically represent people who do not have a specific trait
7.
Alisha and Rob would like to have children. A genetic counselor tells them that they are both carriers of a certain genetic disease. What does this mean?
a)
They both have an allele for the disease and could pass it on to their children, even though neither of them has the disease
b)
there is a very high probability that one or both of them will develop the disease at some point in time
8.
What is the IV in the following hypothesis?
"If I spend more time studying, then my grades in science will improve."
"If I spend more time studying, then my grades in science will improve."
a)
playing soft music in the background
b)
location for studying science
c)
time spent studying
d)
improvement in grades
9.
The main goal of biotechnology is to use living organisms and biological processes to improve life on Earth. Which example would be most beneficial to global populations?
a)
engineering of yeast to contain an enzyme used for making cheese
b)
engineering of rice crops to withstand flooding and contain more nutrients
c)
engineering of fruits so they can ripen slower and can be shipped farther
d)
engineering of eggplant to make it produce fruit in winter
10.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
11.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
12.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
13.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
14.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
15.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
16.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
17.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
18.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
19.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
20.
A phenotype is the...
a)
letter combination
b)
dominant gene
c)
recessive gene
d)
physical appearance
21.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
22.
Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
23.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
24.
Pairs of genes that control the same trait are known as
a)
allelles
b)
gametes
c)
hybrids
d)
loci
25.
If the four existing children in a family are all sons, what chance would there be that the next child would also be a son?
a)
75%
b)
50%
c)
25%
d)
20%
26.
In screech owls, red feathers are dominant over gray feathers. If two heterozygous red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?
a)
25%
b)
50%
c)
75%
d)
100%
27.
Which organelle converts the energy in food into energy for the cell (cellular respiration)?
a)
Ribosomes
b)
Nucleolus
c)
Mitochondria
d)
Golgi Body
28.
What is a sac-like structure used to store water and nutrients? These are much larger in plant cells?
a)
Lysosomes
b)
Mitochondria
c)
Vacuoles
d)
Golgi Body
29.
Animal cells DO NOT have ...
a)
Mitochondria
b)
Lysosomes
c)
Vacuoles
d)
Chloroplasts
30.
ALL living cells have this in common
a)
Nucleus
b)
Cell Membrane
c)
Cell Wall
d)
Mitochondria
31.
This process happens inside chloroplasts
a)
Cellular Respiration
b)
Photosynthesis
c)
Protein Synthesis
d)
Osmosis
32.
Which cell organelle houses the DNA
a)
Nucleus
b)
ribosomes
c)
Chloroplast
d)
vacuole
33.
Protective layer around cells
a)
Lysosome
b)
Cell membrane
c)
organism
34.
Uses energy from the Sun to make food for plants
a)
chloroplast
b)
cytoskeleton
c)
ribosome
35.
The smallest unit of an organism that carries on the functions of life
a)
cell
b)
tissue
c)
organ
36.
Temporary storage structure; stores water, waste and food
a)
nucleus
b)
endoplasmic reticulum
c)
vacuole
37.
Protects and gives shape to plant cells
a)
chloroplast
b)
cell wall
c)
ribosome
38.
Any living thing
a)
tissue
b)
organism
c)
organ system
39.
Contains instructions for everything the cell does
a)
lysosome
b)
cell membrane
c)
nucleus
40.
Which is an accurate difference between plant cells and animals cells?
a)
Animal cells contain lysosomes, but plant cells do not.
b)
Plant cells contain lysosomes, but animal cells do not.
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