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WorksheetsDNA and Genetics Study
Total questions: 48
Worksheet time: 51mins
Name
Class
Date
1.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
2.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
3.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
4.
In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of
a)
cytosine
b)
guanine
c)
thymine
d)
uracil
5.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
6.
Which shows the correct complementary base pairing for DNA?
a)
C-A, T-G
b)
A-G, C-T
c)
C-G, U-A
d)
T-A, G-C
7.
What 3 parts make up a DNA molecule?
a)
Salt, sugar, phosphate
b)
Base, sugar, phosphate
c)
phosphate, ribose, base pairs
d)
A and T, C and G
8.
A sequence of DNA that codes for a protein is called a
a)
trait
b)
codon
c)
characteristic
d)
gene
9.
3 bases of tRNA code for a protein. This 3 base pairs is called a
a)
gene
b)
protein
c)
codon
d)
DNA
10.
Which of the following is NOT a difference of DNA and RNA?
a)
Uracil replaces Thymine in RNA
b)
DNA has two strands
c)
DNA contains deoxyribose, where RNA contains ribose
d)
The base pairs contain the code for proteins
11.
What two types of RNA are there?
a)
dRNA and tRNA
b)
mRNA and hRNA
c)
mRNA and tRNA
d)
jRNA and tRNA
12.
What are the building blocks of DNA?
a)
Sugars
b)
Lipids
c)
Amino Acids
d)
Nucleotides
13.
What biological macromolecule makes up cell membranes?
a)
Proteins
b)
Lipids
c)
Sugars
d)
Phosphates
14.
According to Chargaff's rules, if a sample contains 35% A, how much T will it contain?
a)
35%
b)
65%
c)
50%
d)
Not enough information to tell
15.
What is an enzyme?
a)
A building block of DNA
b)
A protein with a specific function
c)
it ends in --ase
d)
A cell membrane
16.
When DNA is replicated, it is called semi-conservative. Why?
a)
In the new DNA, half is old, half is new
b)
Enzymes memorize old strands and make new ones without destroying original DNA
c)
DNA usually votes Republican in elections
17.
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
18.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
19.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
20.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
21.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
22.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
23.
What happens during incomplete dominance to phenotypes?
a)
The traits are expressed at the same time
b)
The traits are blended
c)
The dominant gene is always expressed
d)
The recessive gene loses
24.
What is a mutation?
a)
A mistake in the copying of DNA to RNA only
b)
DNA is spliced together to make new proteins
c)
A primordial slime makes organisms with 6 eyes
d)
A change in the sequence of DNA
25.
The genetic material of an organism is composed of
a)
lipids
b)
proteins
c)
deoxyribonucleic acid
d)
complex carbohydrates
26.
If a trait is codominant, this means
a)
The Dominant gene is always expressed
b)
both traits will be expressed simultaneously
c)
A blend of the two traits occur
d)
Nothing happens
27.
How many daughter cells are formed during meiosis?
a)
0
b)
1
c)
2
d)
4
28.
What best explains why children resemble their parents?
a)
They eat the same food
b)
They have similar DNA
c)
They speak the same language
d)
They have the same interests
29.
Cross a purebred dominant black rat with a purebred recessive white rat. How many different phenotypes will you see in the offspring?
a)
1
b)
2
c)
3
d)
4
30.
Which of these is an example of a heterozygous genotype?
a)
RR
b)
Rr
c)
yellow
d)
green
31.
Which of these is a nucleotide?
a)
sugar
b)
sugar, phosphate and a base
c)
a matching base pair
d)
phosphate
32.
Which of these is the complementary strand of DNA to the strand below?ATAGC
a)
UAUCG
b)
ATAGC
c)
TATCG
d)
TATGC
33.
What is not a possible outcome of a mutation in DNA?
a)
An advantageous trait
b)
A disadvantage in traits
c)
No change
d)
Nuclear winter
34.
What, other than genotypes, has an effect on the offspring of two parents?
a)
Nothing. Genetics is everything
b)
Chance
c)
Dominance and recessiveness
d)
Mutations
35.
Y for yellow body is dominant over y for blue body. What alleles would produce yellow bodies?
a)
YY,yy
b)
Yy,yy
c)
YY only
d)
YY,Yy
36.
The exact genetic makeup of an organism, such as RR, Tt, PP is its?
a)
phenotype
b)
dominance
c)
genotype
d)
trait
37.
TT,tt,PP,pp,SS,ss are examples of alleles that are?
a)
homozygous
b)
heterozygous
c)
different
d)
homologous
38.
What type of "square" helps us solve genetic problems?
a)
carpenter square
b)
Mendel square
c)
Punnett square
d)
genetic square
39.
What is attached to a codon of tRNA?
a)
A nucleotide
b)
An amino acid
c)
a sugar
d)
DNA
40.
How many alleles (letters) does each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
41.
The DNA sequence TACGAA would be transcribed to
a)
AUGCUU
b)
ATGCTT
c)
GCATCC
d)
GCAUCC
42.
What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
43.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
44.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
45.
This pedigree represents the inheritance of hemophilia in this family. How many of the females have the hemophilia trait?
a)
8
b)
5
c)
2
d)
3
46.
How many children did individuals I-1 and I-2 have?
a)
2
b)
4
c)
6
d)
8
47.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
48.
Does this pedigree show a dominant or recessive trait?
a)
Dominant
b)
Recessive
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