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WorksheetsGenetics
Total questions: 30
Worksheet time: 28mins
Name
Class
Date
1.
Which statement best describes Mendel's experiments?
a)
He began with hybrid plants
b)
He controlled pollination
c)
He observed only one generation
d)
He used plants that reproduce slowly
2.
What was the independent variable in Mendel's experiments?
a)
the richness of the soil
b)
the type of pollination
c)
the color of the flowers
d)
the height of the stems
3.
What was the dependent variable in Mendel's experiment?
a)
the richness of the soil
b)
the type of pollination
c)
the color of the flowers
d)
the amount of sunlight
4.
Which term describes the genotype of the offspring of the first generation in Mendel's experiment?
a)
true breeding
b)
purebred
c)
hybrid
d)
homozygous
5.
Mendel used pea plants for his experiment because _______
a)
They reproduce quickly
b)
they have easily observable traits
c)
He was able to control pollination
d)
All of the above
6.
When Mendel crossed a true breeding plant with purple flowers with a true breeding plant with white flowers, all the offspring had purple flowers. This is because white flowers are _____________
a)
the dominant trait
b)
the recessive trait
c)
a trait controlled by multiples alleles
d)
a trait controlled by multiples genes
7.
If yellow (Y) is dominant over green (y), what would be the genotype for a hybrid?
a)
YY
b)
yy
c)
Yy
d)
None of the above
8.
If yellow (Y) is dominant over green (y), What is the probability to have a green seed if you cross two hybrids?
a)
100%
b)
75%
c)
25%
d)
0%
9.
If yellow (Y) is dominant over green (y), What is the probability to have a homozygous dominant if you cross two hybrids?
a)
100%
b)
75%
c)
25%
d)
0%
10.
If yellow (Y) is dominant over green (y) and a 100 seeds were collected after a crossing of two hybrids, how many seeds are going to be green?
a)
100 seeds
b)
75 seeds
c)
25 seeds
d)
0 seeds
11.
Which is NOT true of a hybrid?
a)
It has one recessive allele
b)
It has one dominant allele
c)
Its genotype is homozygous
d)
Its phenotype is dominant
12.
Which is true of an offspring with incomplete dominance?
a)
Both alleles can be observed in its phenotype
b)
Every offspring shows the dominant phenotype
c)
Multiple genes determine its phenotype
d)
Offspring phenotype is a combination of the parents' phenotypes
13.
In a case of incomplete dominance, if a true breeding white flower is crossed with a true breeding red flower, all of the offspring will be ____________
a)
red
b)
pink
c)
white
d)
purple
14.
Which human characteristic is controlled by polygenic inheritance?
a)
weight
b)
skin color
c)
eye color
d)
all of the above
15.
Which are the possible blood phenotypes for a child who's mother is type O and father is type AB?
a)
Type O and Type A
b)
Type O and Type AB
c)
Type A and Type B
d)
Type AB only
16.
A pink flower crossed with another pink flower produces six pink flowers and two white flowers. What conclusion can you draw about the parent generation?
a)
The parents each had only alleles for the dominant pink flower
b)
Flower color shows incomplete dominance
c)
The parents each had two alleles for the recessive white flower gene
d)
The parents each had one allele for the dominant pink flower gene and one recessive white flower gene
17.
The designation Rr for a pea plant's flower shows that the plant is ________
a)
purple
b)
heterozygous
c)
homozygous
d)
true- breeding
18.
A cow with red hairs and white hairs in its coat is an example of _________
a)
codominance
b)
multiple alleles
c)
polygenic inheritance
d)
incomplete dominance
19.
A new plant species is discovered. Biologists note that some flowers have royal blue (dark blue) petals and that others have white petals. A biologist cross-pollinated white flowering plants with blue flowering plants. What color petals will be observed if there is incomplete dominance?
a)
white
b)
spotted
c)
light blue
d)
royal blue
20.
Why is the enzyme that unwind and unzip the molecule of DNA during replication?
a)
Helicase
b)
Polymerase
c)
Ligase
d)
None of the above
21.
A nucleotide is made of _____________
a)
a nitrogen base
b)
a phosphate group
c)
a sugar molecule
d)
all of the above
22.
What is the shape of the molecule of DNA?
a)
single helix
b)
double helix
c)
tripe helix
d)
None of the above
23.
The goal of transcription is to _______
a)
Make proteins
b)
make a molecule of mRNA
c)
makes a molecule of DNA
d)
make an amino acid
24.
If the triplets in the mRNA reads "AUC", which tRNA will bring the amino acid to the ribosome?
a)
"GAT"
b)
"AAG"
c)
"TAG"
d)
"UAG"
25.
What is the complementary strand for the given segment of DNA? AAGCTACCG
a)
UUCGAUGGC
b)
TTCGATGGC
c)
TTCGAUGGC
d)
TTGCATCCG
26.
What is the enzyme that proofread the newly made bases during replication?
a)
Helicase
b)
Ligase
c)
DNA polymerase
d)
RNA polymerase
27.
Transcription process take places in ______________
a)
the ribosome
b)
the cytoplasm
c)
the nucleus
d)
the mitochondria
28.
During the transcription processs, ________ builds the mRNA
a)
DNA polymerase
b)
Helicase
c)
Ligase
d)
RNA polymerase
29.
Which of the following statement is correct?
a)
RNA is double stranded while DNA is made of a single strand
b)
DNA contains the nitrogen base thymine while RNA contains uracil
c)
RNA contains a deoxyribose sugar molecule in its backbone and DNA contains a ribose sugar molecule
d)
None of the above
30.
If one or more nitrogen bases are deleted from the original strand of DNA, the gene mutation is called _________
a)
a deletion
b)
an addition
c)
an insertion
d)
a substitution
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