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WorksheetsGenetics Review
Total questions: 43
Worksheet time: 22mins
Name
Class
Date
1.
__________ are what pass inherited traits from parents to their children.
a)
nuclei
b)
chromosomes
c)
genes
d)
phenotypes
2.
__________ was the scientist who first studied pea plants to learn more about heredity.
a)
Mendel
b)
Einstein
c)
Gregory
d)
Bill Nye
3.
If both genes for a trait are the same, the offspring is called
a)
purebred
b)
hybrid
c)
recessive
d)
dominant
4.
Using a Punnett Square, what is the probability of a purebred hamster with light fur (dominant) and purebred hamster with dark fur of having offspring with light fur?
a)
25%
b)
50%
c)
75%
d)
100%
5.
How many chromosomes do normal diploid human cells have?
a)
n=19
b)
n=23
c)
n=39
d)
n=46
6.
How many chromosomes do normal haploid human cells have?
a)
n=19
b)
n=23
c)
n=39
d)
n=46
7.
What term means the smallest unit that is able to perform the basic functions of life?
a)
organelles
b)
atom
c)
molecule
d)
cells
8.
What organelle produces most of the energy needed by a cell?
a)
chloroplasts
b)
mitochondria
c)
ribosomes
d)
Golgi
9.
In what type of cells would you expect to find a lot of mitochondria?
a)
skin cells
b)
blood cells
c)
bone cells
d)
muscle cells
10.
What organelle is responsible for direction of all of the cell's activities?
a)
nucleus
b)
ribosomes
c)
mitochondria
d)
plasma membrane
11.
Arrange from smallest to largest: organ, cell, organism, tissue, organ system
a)
cell, tissue, organ, organ system, organism
b)
organism, organ system, organ, tissue, cell
c)
cell, organ, tissue, organ system, organism
d)
cell, tissue, organism, organ, organ system
12.
Two forms of the same gene are known as
a)
Alleles
b)
Chromosomes
c)
Genotypes
d)
Sex cells
13.
Long, thin fibers that carry information that controls the cell's activities are
a)
nucleic acids
b)
dominant traits
c)
recessive traits
d)
chromosomes
14.
If you cross a white flower (pp) with a purple flower (PP), the possible genotypes and phenotypes are
a)
PP - purple flowers AND pp - white flowers
b)
Pp - purple flowers only
c)
PP, Pp - purple flowers only
d)
pp - white flowers only
15.
The passing of traits from parents to offspring is
a)
probability
b)
heredity
c)
recessive
d)
dominant
16.
B is for brown eyes and b is for blue eyes. Cross a hybrid with a purebred recessive. What % of the offspring are heterozygous?
a)
25%
b)
50%
c)
75%
d)
100%
17.
Mutations are changes in
a)
DNA
b)
the cell cycle
c)
tRNA
d)
proteins
18.
What is the part of a chromosome that carries information for a specific trait called?
a)
nucleic acid
b)
gene
c)
genotype
d)
phenotype
19.
A zygote is
a)
A male reproductive cell
b)
a female reproductive cell
c)
a newly formed cell after the union of a sperm and egg
d)
both male and female reproductive cells
20.
Which statement best shows the difference between dominant and recessive traits?
a)
Recessive traits show up more often than dominant traits
b)
Recessive traits show up as often as dominant traits
c)
Recessive traits show up less often than dominant traits
d)
Recessive and dominant traits are the same
21.
What % of pea plants showed the dominant phenotype?
a)
100%
b)
75%
c)
50%
d)
25%
22.
What % of pea plants showed the recessive phenotype?
a)
100%
b)
75%
c)
50%
d)
25%
23.
What is genotype of the dwarf pea plants?
a)
DD
b)
Dd
c)
dd
d)
Can't tell
24.
What are the possible genotypes of the regular pea plants?
a)
DD and dd
b)
DD and Dd
c)
Dd and dd
d)
can't tell
25.
What are the genotypes of the parents?
a)
Dd and dd
b)
DD and Dd
c)
Dd and Dd
d)
dd and dd
26.
Genes are sequences of DNA which are made up of
a)
nucleotides
b)
chromosomes
c)
phosphates
d)
ribosomes
27.
The base sequence of nucleotides in a DNA strand that compliments the DNA base sequence ACGAT is
a)
TGCTA
b)
ACGAT
c)
CGCTA
d)
TGCAT
28.
Which is an example of an acquired trait?
a)
eye color
b)
hair color
c)
blood type
d)
ability to read
29.
A human female would have which set of sex chromosomes?
a)
XX
b)
YY
c)
XY
d)
XXY
30.
If one copy of a dominant allele is present in a genotype for a trait, then the trait is
a)
expressed in the phenotype
b)
not expressed in the phenotype
c)
partially expressed in the phenotype
d)
NOT THIS ONE
31.
Genetic engineering involves
a)
inserting changed DNA into an organism
b)
cross-breeding plants
c)
testing new medicines for genetic diseases
d)
using x-rays to change DNA
32.
If one parent has two dominant alleles and another parent has two recessive alleles, the offspring will have
a)
the recessive phenotype
b)
the dominant phenotype
c)
two dominant alleles
d)
two recessive alleles
33.
Cells that contain half the usual number of chromosomes are
a)
fertilized egg cells
b)
gametes
c)
alleles
d)
diploid cells
34.
proteins are made up of a sequence of
a)
chromosomes
b)
amino acids
c)
nucleotides
d)
base pairs
35.
The process that produces haploid cells is known as
a)
mitosis
b)
reproduction
c)
meiosis
d)
fertilization
36.
What happens when fertilization occurs?
a)
Two 2n cells combine in a new cell
b)
Two n cells combine into a new cell
c)
Two 2n daughter cells are produced
d)
Two n daughter cells are produced
37.
Which does not occur during meiosis?
a)
Four haploid daughter cells are produced
b)
Two diploid daughter cells are produced
c)
Only cells that are gametes are produced
d)
Daughter cells are produced that contain half the chromosomes of the parent cell
38.
What happens during replication?
a)
DNA is copied
b)
RNA is copies
c)
Ribosomes are made
d)
Proteins are made
39.
Which nucleotide is found only in RNA?
a)
Thymine
b)
Guanine
c)
Adenine
d)
Uracil
40.
The main function of mRNA in protein synthesis is to
a)
transfer amino acids to a ribosome
b)
carry proteins to the ribosome
c)
transcribe genes from DNA
d)
connect nucleotides together
41.
Which is a known cause of genetic mutations?
a)
poor nutrition
b)
malaria
c)
UV radiation
d)
cancer
42.
A pedigree shows
a)
how proteins are synthesiszed
b)
how members of a family are related
c)
where mutations are located in a sequence of DNA
d)
which triplet of bases matches up with a particular amino acid
43.
The main goal of the Human Genome Project was to
a)
find cures for genetic diseases
b)
find all mutations in human DNA
c)
count the number of genes in human DNA
d)
sequence all DNA on human chromosomes
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