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WorksheetsHeredity and Genetic Review
Total questions: 61
Worksheet time: 33mins
What is a trait that will only exhibit when the dominant allele is not present.
DNA
Dominant
Recessive
If you cross a white flower (pp) with a purple flower (PP), the possible genotypes of the offspring are
PP and pp
All Pp
All PP
All pp
If you crossed a PP (purple) with a pp (white), what would the phenotypes be?
all white
all tall
all purple
1/2 white, 1/2 purple
The organism's appearance is known as its
heredity
pedigree
phenotype
genotype
If you cross two rabbits that have the genotype Bb, how many possible genotypes can be found in the offspring?
one
two
three
four
_____________ describes a trait that covers over, or masks another form of that trait.
recessive
gene
allele
dominant
_________________ describes a trait that is covered over, or masked by another form of that trait.
dominant
punnett
recessive
gene
The letters representing the phenotype is called
phenotype
genotype
Different forms of a gene are called
alleles
traits
Two of the same alleles of the gene for a certain trait
heterozygous
homozygous
Two different alleles of the gene for a certain trait
homozygous
heterozygous
In a pedigree, what do circles represent?
males
females
carrier
non carrier
In a pedigree, when a circle of square is halfway shaded, is it
male
female
carrier
non carrier
Which genotype is hetrozygous?
Bb
BB
DD
dd
Which genotype is homozygous dominant?
Bb
bb
BB
Dd
Which is NOT an example of a phenotype?
black fur
blue eyes
brown hair
bb
Which genotype is homozygous recessive?
Bb
BB
bb
brown eyes
The brown eye trait is dominant over blue eyes. Which of the following genotypes best represents the phenotype for blue eyes?
BB
Bb
bb
bB
In the Punnett square, White petal color ( W ) is dominant over purple petal color ( w ). Of the four offspring, how many will have the white phenotype?
1
2
3
4
Which of the following is true?
1, 2, and 3 are carriers
1 and 2 are the grandparent generation
3 and 4 have heterozygous genotypes
2 has the dominant phenotype
If green (G) is dominant over purple (g), then what is the genotype for this organism?
Purple
Green
Gg
gg
The above pedigree is most consistent with the observation that Huntington's Disease is —
A is carried on the X chromosome
B a dominant phenotype
C can be diagnosed on a karyotype
D is a polygenic trait
Traits controlled by two or more genes from different chromosomes
medelian gene
monogenic
trait
polygenic
trait
allele
trait
In humans, cystic fibrosis is a recessive genetic disorder that results in mucus clogging the lungs. If both parents are genetically heterozygous for cystic fibrosis, then what are their chances of having a child who DOES NOT HAVE the disease? (Hint: draw a Punnett Square on a piece of scratch paper to help you answer the question.)
25%
50%
75%
100%
In humans, the trait for dimples is dominant over no dimples. If a heterozygous parent is crossed with a homozygous recessive parent, then what is the probability this couple will have offspring with dimples? (Hint: draw a Punnett Square on a piece of scratch paper to help you answer the question.)
25%
50%
75%
100%
In a classic Mendelian cross, a homozygous plant that produces purple fruit is crossed with a homozygous plant that produces blue fruit. The seeds of all the offspring are purple. Why? (Hint: draw a Punnett Square on a piece of scratch paper to help you answer the question.)
the alleles are expressing incomplete dominance
the alleles are expressing codominance
The blue allele is recessive to the dominant purple allele
Albinism (b), is recessive to normal brown coloration (B). When an albino female was crossed with a brown male, they produced 2 offspring that had brown coloring and 2 that were albino. What was the genotype of the male parent?
BB
bb
Bb
Looking at the blood donation chart from our Blood Typing Lab, who is considered the "universal donor"?
A
B
AB
O
If a person with O blood type produces offspring with a person heterozygous for A blood, then what percentage of their offspring will be type O? (HINT: draw a punnett square to help solve the problem)
0%
25%
50%
100%
Which blood type would not be possible for children of a Type AB mother & a Type B father? (Hint: draw a Punnett Square on a piece of scratch paper to help you answer the question.)
A
B
AB
O
Different forms of a gene are called
alleles
traits
A man who is heterozygous for type B blood and a woman who is homozygous for type A. What are the chances that their first child will have type AB blood?
25%
50%
75%
100%
In cows there is this color called roan. When you look at the hair closely you can see both red and white hairs. What complex inheritance pattern represents this trait?
Incomplete Dominance
Codominance
Orville Oompa is heterozygous for type A blood. He wants to have kids that have type B blood. Is it possible for this to happen? If so, which genotype would his wife have to be?
AA
AO
O
BO
A gardener decides she wants to have pink flowers for valentines day. Pink is a color that you get when you mix red and white. What cross will produce the most pink-flowered plants?
RR x WW
RW x RW
RW x WW
RR x RW
In cattle roan is a color produced when a cow has BOTH RED AND WHITE hairs. Orville Oompa has 25 female cows on his farm, but decides he wants the next generation of cattle to be all red. He goes to his neighbor and purchases a red bull (male cow), and brings it to his farm. Orville Oompa crosses the red male with with only the roan females, and 20 new calves are produced. Of those 20 offspring, how many could orville expect to be red based on probabilities?
5
10
15
20
A trait that is located on the X chromosome is called
Multiple alleles
Codominance
Polygenic Inheritance
X-linked traits
A trait that is controlled by more than one gene is called
Polygenic Inheritance
Multiple alleles
Incomplete dominance
Codominance
A trait in which a third phenotype appears that is always a blend of the parental phenotypes is called
Polygenic Inheritance
Multiple alleles
Incomplete dominance
Codominance
A trait in which a third phenotype appears which includes both parental phenotypes (neither is lost) is called
Polygenic Inheritance
Multiple alleles
Incomplete dominance
Codominance
A trait that has more than two alleles available per gene is called
Polygenic Inheritance
Multiple alleles
Incomplete dominance
Codominance
Disorder: Colorblindness (X-linked)
Alleles: XB, Xb
Dominant form of trait (B): Normal vision (not colorblind)
Recessive form of trait (b): person is colorblind
What is the genotype of a colorblind female?
XBXB
XBXb
XbXb
XbY
Disorder: Colorblindness (X-linked)
Alleles: XB, Xb
Dominant form of trait (B): Normal vision (not colorblind)
Recessive form of trait (b): person is colorblind
What is the genotype of a colorblind male?
XBXB
XBY
XbXb
XbY
Disorder: Hemophilia (X-linked)
Alleles: XH, Xh
Dominant form of trait (H): Normal
Recessive form of trait (h): person has hemophilia
A phenotypically normal woman has phenotypically normal parents. However, she has a hemophilic brother. What are her chances of being a carrier for hemophilia?
0%
100%
75%
50%
A woman with type B blood has two brothers with type O blood and one sister with type A blood. What are their parents’ genotypes? Use a Punnett square to show your work.
IAi x IBi
IAIA x IBIB
IAIA x ii
IBIB x ii
Which type of inheritance patterns does blood type demonstrate?
multiple alleles and incomplete dominance
polygenetic inheritance and incomplete dominance
polygenetic inheritance and codominance
multiple alleles, polygenic, complete dominance and codominance
One of Mendel's laws that states that two alleles for each trait during meiosis.
Law of Independent Assortment
Law of Segregation
Genetic Recombination
Homozygous
One of Mendel's that states that the random distribution of alleles occurs during genetic formation.
Recessive State of Genetics
Genetic Recombination
Law of Segregation
Law of Independent Assortment
