WorksheetsUnit 3 (Genetics & Heredity) Study Guide Review
Total questions: 33
Worksheet time: 37mins
A gardener wants to grow plants with large purple flowers. She crosses two parent plants that have large purple flowers in order to produce the desired trait in the offspring.
Which best describes the scenario?
genetic engineering
cloning
selective breeding
gene therapy
Janelle thinks that genetic engineering could be used to make a larger fruit rather than cloning the fruit. Which would best support her point of view?
Genetic engineering doesn't cost as much.
Genetic engineering doesn't result in genetically identical organisms.
Genetically engineered foods never cause allergies in people.
Genetically engineered foods have not been modified.
The Punnett square shows the results when two parent cows are crossed. R represents the allele for red hair, and r represents the allele for white hair.
Which best describes this inheritance pattern?
incomplete dominance because the intermediate form of the trait is chosen
codominance because the intermediate form of the trait is chosen
incomplete dominance because the offspring display alleles for both hair colors
codominance because the offspring display alleles for both hair colors
Which statement describes the blood type of a person with the alleles ii?
It is type AB because i is recessive.
It is type O because i is recessive.
It is type O because i is codominant.
It is type AB because i is codominant.
Purple flowers are dominant over white flowers. The parent generation includes two heterozygous parents. What are the possible phenotypes of these parents' offspring?
1 white, 2 speckled, 1 purple
1 purple, 2 lilac, 1 white
3 white, 1 purple
3 purple, 1 white
A widow’s peak is dominant over a straight hairline. The genotypes of the offspring are WW, Ww, ww, and ww. What are the phenotypes of the offspring?
2 widow's peak, 2 straight hairline
3 widow's peak, 1 straight hairline
1 widow's peak, 3 straight hairline
4 widow's peak, 0 straight hairline
Jared is homozygous for earlobe type. What does this mean?
He has two different alleles for earlobe type, one from each parent.
He has one allele for earlobe type from one parent.
He has two alleles for earlobe type, both from the same parent.
He has two of the same alleles for earlobe type, one from each parent.
A rabbit is heterozygous for fur color. Black fur is dominant (B) and brown fur is recessive (b).
Which describes the rabbit’s genotype and phenotype?
genotype: black fur
phenotype: BB
genotype: black fur
phenotype: Bb
genotype: Bb
phenotype: black fur
genotype: black BB
phenotype: black fur
A DNA sequence is shown.
AAT - CCG - GTG
Which sequence best shows the result of a substitution mutation in the DNA?
AAT-CCG-GTG
AAT-CCA-GTG
ACA-TCC-GGT-G
AAT-CCG-TG
In DNA, what nitrogen base pairs with adenine?
cytosine
guanine
thymine
uracil
Which occurs during both DNA replication and protein production?
RNA leaves the nucleus
DNA leaves the nucleus
RNA unzips
DNA unzips
Which statement does NOT accurately describe gene therapy?
It cures all cases of cystic fibrosis.
It is difficult to apply to all cells affected by the disorder.
It attempts to replace a mutated gene with normal DNA.
It does not always cure patients who use it.
Which statement correctly compares the inheritance of blood type in humans and the inheritance of length of ears in corn plants?
Blood type is controlled by multiple forms of a single gene, while the length of corn ears is controlled by many different genes.
Blood type is controlled by many different genes, while the length of corn ears is controlled by multiple forms of a single gene.
Both blood type and the length of corn ears are controlled by multiple forms of a single gene.
Both blood type and the length of corn ears are controlled by many different genes.
Which describes the letter that belongs where the question mark is?
T because there are offspring that are heterozygous.
T because there are offspring that are homozygous.
t because there are offspring that are homozygous.
t because there are offspring that are heterozygous.
In humans, unattached earlobes are dominant over attached earlobes.
Which could be the genotype for someone with attached earlobes?
Ee
e
E
ee
Which is an example of a polygenic inheritance pattern?
hairline
hair texture
blood type
eye color
Which is NOT an example of a polygenic inheritance pattern?
birth weight
eye shape
length of corn ears
skin color
Which DNA strands below show a deletion mutation?
Original: ATC-CCG-TAT-GAC-CGA-AAT
ATC-CCG-TAT-CAT-GAC-CGA-AAT
ATC-CCG-TAT-AAC-CGA-AAT
ATC-CCG-TAG-ACC-GAA-AT
ATC-CCG-TAT-AGA-CCG-AAA
Who is called the "father of heredity"?
Gregor Mendel
George Wright
Sir Isaac Newton
Ptolemy
Which statement is FALSE?
Cloning is different from sexual reproduction because...
it only uses one set of DNA rather than two.
it has the same DNA as the parent.
it can create multiple variations of offspring.
it is more efficient.
Which is an example of incomplete dominance?
A black dog and a white dog have a white offspring.
A mutation causes an albino offspring.
A mother who can roll her tongue and a father who cannot roll his have a child who can roll their tongue.
A white rose and a red rose are crossed to create a pink rose.
Which is an example of codominance?
A white flower and a purple flower are crossed to yield a lilac flower.
A black rooster and a white chicken have a speckled hen as their offspring.
A dad with freckles and a mom with freckles have a baby with no freckles.
A black cat and an orange cat have a white kitten.
Which structure carries instructions for producing the proteins that help make a person’s hair curly?
phosphate
deoxyribose
lipid
gene
Red hair is dominant in horses. If a horse's genotype is Rr, what will its phenotype be?
rr
red hair
white hair
R
What is the GENOTYPE for square A?
yy
Yy
YY
yellow
green
What is the GENOTYPE for square B?
yy
Yy
YY
yellow
green
What is the PHENOTYPE for square C?
yy
Yy
YY
yellow
green
What is the PHENOTYPE for square D?
yy
Yy
YY
yellow
green
In RNA, A pairs with...
C
G
U
T
Which of these is a BENEFICIAL mutation?
lactose tolerance
allergies
sickle-cell anemia
albinism
Explain how a child could have a different blood type than both of its parents.
You may use the image and word bank for reference.
Word Bank: allele, genotype, offspring
Give an example for each type of mutation...
1. harmful
2. neutral
3. beneficial
Dimples are a dominant trait (D) and no dimples is recessive (d).
If Miguel's mother has the homozygous dominant trait for dimples and his father has the homozygous recessive trait for dimples, what is the probability that Miguel WILL have dimples? Explain how you know.
Must include:
-genotype and phenotype for both of Miguel's parents (2 points)
-all possible phenotypes and genotypes for Miguel (2 points)
-probability percentage for each genotype outcome (2 points)
-probability percentage for Miguel HAVING dimples (phenotype) (2 points)
-Explain how you know. (2 points)
(Suggestion: draw a Punnett square for the situation and describe the outcomes).
