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WorksheetsGenetics and DNA Review
Total questions: 30
Worksheet time: 56mins
Name
Class
Date
1.
If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
2.
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
3.
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
4.
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
5.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
6.
A human usually has _____ total chromosomes.
a)
6
b)
22
c)
4
d)
46
7.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
8.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
9.
B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
10.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
11.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
12.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
13.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
14.
the base that pairs with Thymine in DNA
a)
adenine
b)
guanine
c)
helicase
d)
nucleotide
15.
nitrogen base that pairs with guanine
a)
adenine
b)
cytosine
c)
nucloetide
d)
deoxyribose
16.
monomer of nucleic acid; consisting of a sugar, phosphate, and nitrogen base
a)
nucleotide
b)
guanine
c)
deoxyribose
d)
DNA
17.
How did Rosalind Franklin's photo 51 affect th work of Watson and Crick?
a)
It was used to determine the physical structure of DNA
b)
It was used to identify the four bases that make up DNA
c)
It was used to determine the theory of independent assortment
d)
It was used to show DNA was the molecule of inheritance
18.
Which sequence of DNA bases would pair with this partiaal strand
ATG TGA CAG
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
19.
Which series is arranged in order from largest to smallest in size?
a)
chromosome, nucleus, cell, DNA, nucleotide
b)
cell, nucleus, chromosome, DNA, nucleotide
c)
nucleotide, chromosome, cell, DNA, nucleus
d)
cell, nucleotide, nucleus, DNA, chromosome
20.
Watson and Crick were the first to suggest that DNA is _____
a)
a short molecule
b)
the shape of a double helix
c)
a protein molecule
d)
the genetic material
21.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
22.
Nucleotides are made up of a sugar, phosphate, and..?
a)
nitrogenous base
b)
nucleic acid
c)
cholesterol
d)
fatty acid
23.
Replication is referred to as...
a)
conservative
b)
semi-conservative
c)
quasi-conservative
d)
mostly liberal
24.
The enzyme that adds new nucleotides in replication is called
a)
primase
b)
DNA polymerase
c)
RNA polymerase
d)
ligase
25.
Cell division requires that genetic material be able to...
a)
store information
b)
undergo replication
c)
undergo rare genetic mutations
26.
The scientist which suggested base pairing of nucleotides is.
a)
Watson
b)
Avery
c)
Chargraff
d)
Franklin
27.
If a pea plant has a recessive allele for green peas, it will produce
a)
green peas if it also has a dominant allele for yellow peas.
b)
both green peas and yellow peas if it also has a dominant allele for yellow peas.
c)
green peas if it does not also have a dominant allele for yellow peas.
d)
yellow peas if it does not also have a dominant allele for green peas.
28.
The principles of probability can be used to
a)
predict the probability of the traits of the offspring of genetic crosses.
b)
determine the actual outcomes of genetic crosses.
c)
decide which organisms are best to use in genetic crosses.
d)
determine which species should be used in genetic crosses.
29.
Gregor Mendel’s principles of genetics apply to
a)
Only humans
b)
Only pea plants
c)
Only animals
d)
All organisms
30.
If a pea plant’s alleles for height are tt, what is true of its parents?
a)
They both were short
b)
They both were tall
c)
They both contributed the recessive allele
d)
They both contributed the dominant allele
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