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WorksheetsBio111 Ch 14 & 15 Mendel & Inheritance practice
Total questions: 66
Worksheet time: 1hrs 8mins
Name
Class
Date
1.
Purebred is another word for __________, while hybrid is another word for __________.
a)
dominant; recessive
b)
recessive; dominant
c)
homozygous; heterozygous
d)
heterozygous; homozygous
2.
father of genetics
a)
Gregor Mendel
b)
James Watson
c)
Dr. Robbins
d)
Francis Crick
3.
Jackie is homozygous recessive for having dimples (D). What is her genotype?
a)
pp
b)
Dd
c)
dd
d)
DD
4.
If an organism is DdGg, what is one of the alleles that would be found in the gametes produced?
a)
Dd
b)
DG
c)
Gg
d)
DD
5.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the probability of having a white flowered plant if the parents were heterozygous red and homozygous red?
a)
0%
b)
25%
c)
50%
d)
100%
6.
Human somatic cells have a _____ total chromosomes.
a)
6
b)
22
c)
4
d)
46
7.
Two heterozygous (Tt)tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
d)
100% tall
8.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
9.
In a Punnett square each box represents a(n)....
a)
offspring
b)
parent
c)
gene
d)
trait
10.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
11.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
12.
This type of inheritance pattern shows BOTH traits in hybrid offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
13.
What is the genotypic ratio in this cross?
R= round r= wrinkled
R= round r= wrinkled
a)
3:1 (3 round to 1 wrinkled)
b)
1:2:1 (1 RR, 2 Rr, 1 rr)
c)
75% round, 25% wrinkled
d)
1:3 (1 round to 3 wrinkled)
14.
The law that states that the inheritance of one trait has no effect on the inheritance of another is
a)
the law of independent assortment
b)
the law of dominance
c)
the law of segregation
15.
A couple has 4 girls. What are the odds of the couple having a boy?
a)
1/4
b)
1/5
c)
1/2
d)
1/8
16.
Each parent contributes one of the genes for a particular trait. The genes of the pair are called:
a)
variables
b)
gametes
c)
hybrids
d)
alleles
17.
The gene makeup of an organism for a particular trait is known as its
a)
dominance
b)
phenotype
c)
allele
d)
genotype
18.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
19.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
20.
What is a phenotype?
a)
The expression of a trait; physical appearance.
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
21.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
22.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
23.
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
24.
An allele whose trait always shows up in the organism when the allele is present.
a)
recessive allele
b)
dominant allele
c)
hidden allele
d)
present allele
25.
A diagram in which several generations of a family and the occurrence of certain genetic characteristics are shown is called a
a)
Punnett square.
b)
monohybrid cross.
c)
pedigree.
d)
family karyotype.
26.
Which of the following traits is controlled by multiple alleles in humans?
a)
sickle cell anemia
b)
blood type
c)
hemophilia
d)
pattern baldness
27.
What would be the blood type of a person who inherited an A allele from one parent and an O allele from the other?
a)
type A
b)
type B
c)
type AB
d)
type O
28.
If a characteristic is X-linked recessive, it
a)
occurs most commonly in males.
b)
occurs only in females.
c)
can never occur in females.
d)
is always fatal.
29.
Since the allele for colorblindness is located on the X chromosome, colorblindness
a)
cannot be inherited.
b)
occurs only in adults.
c)
is sex-linked.
d)
None of the answers are correct.
30.
A person who is heterozygous for a disorder caused by recessive alleles is a carrier of the disorder. A carrier is a person who
a)
does not have the disorder but can pass it on to offspring.
b)
can develop the disorder later in life but cannot pass it on.
c)
has a dominant normal allele that has been inactivated.
d)
passes the disorder to offspring on the Y chromosome only.
31.
A plant that is homozygous for red flowers is crossed with a plant that is homozygous for white flowers. In the case of incomplete dominance, the flowers of the offspring will be
a)
red and white.
b)
white only.
c)
pink only.
d)
red only.
32.
The wide range of eye color indicates that eye color is
a)
sex-linked.
b)
recessive.
c)
polygenic.
d)
epistatic.
33.
What is the genotype of both great-grandsons? (Individuals 13 and 16)
a)
AA
b)
Aa
c)
A_
d)
aa
34.
Review the pedigree...the female in the 1st generation must have which of the following genotypes...read the pedigree...think!
a)
XRXr
b)
RR
c)
XRXR
d)
Rr
35.
This pedigree shows which of the following?
AND...why?
AND...why?
a)
Autosomal recessive-the females are carriers
b)
Autosomal recessive-there is a female with it and if it were sex-linked only males would have it
c)
Sex-Linked recessive-the females are carriers
d)
Sex-Linked recessive-males have it from their carrier mothers
36.
Which of the following terms refers to the different possibilities of a gene?
a)
chromosome
b)
DNA
c)
Punnett Squares
d)
allele
37.
True/False: Different genotypes can code for the same phenotype.
a)
True
b)
False
38.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
39.
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
a)
100% Pp (purple)
b)
50% Pp (purple); 50% pp (white)
c)
75% Pp (purple); 25% pp (white)
d)
25% PP, 50% Pp, 25% pp
75% purple, 25% white
75% purple, 25% white
40.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
41.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
42.
If a person has a genotype of RR, what do you know about their gametes (sex cells)?
a)
They will all carry the R allele.
b)
They will all carry RR.
c)
Some will carry R, some will carry r.
d)
They will all carry the r allele.
43.
What is the percentage of homozygous recessive offspring?
a)
0%
b)
25%
c)
50%
d)
75%
44.
Tay Sachs disease is a fatal genetic disorder. Children born with this disorder generally die before they are five years old. A couple has had three children who died of Tay Sachs. About this couple it can safely be assumed that:
a)
any children they have in the future will also die from this disease
b)
they are both heterozygous for the Tay Sachs trait
c)
they are both homozygous for the Tay Sachs trait
d)
one is heterozygous and the other is homozygous for the Tay Sachs trait
45.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
46.
Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?
a)
9/16
b)
3/16
c)
1/16
d)
16/16
47.
Which of the following crossover events would be most difficult to detect in offspring?
a)
A crossover occurring in the region between gene A and G
b)
A crossover occurring in the region between gene G and T
c)
A crossover occurring in the region between gene T and B
d)
A crossover occurring in the region between gene A and T
48.
Map relative position of the four genes on a chromosome from the data on crossover frequencies.
a)
ABCD
b)
ADCB
c)
CABD
d)
CBAD
49.
The pedigree shown indicates the expression pattern of VHL in a specific family. Genetic counselors told the affected female that she and her non-carrier husband had a 50% chance of producing children with VHL. Based on this information, which of the following best describes the inheritance pattern for this disorder?
a)
X-linked recessive
b)
Incomplete dominance
c)
Autosomal dominance
d)
Autosomal recessive
50.
Australian Shepherds are a breed of dogs whose coat color is directly impacted by two different genes. The gene that determines basic coat color exhibits a dominant allele (B) for black coat color and a recessive allele (b) for red coat color. Additionally, these dogs can have a solid coat color (mm) or a mixed pattern coat color called merle (Mm). The homozygous dominant coat color is called a lethal white (MM) which produces pups that are deaf and blind. What is the probability that two red Australian shepherds will produce a black pup?
a)
0
b)
1/4
c)
1/2
d)
3/4
51.
The diagram depicts an experiment in which ice packs were strapped to a hair-free patch on a species of rabbits. The new hair that grew in the patch exposed to cold was black.Which of the following statements is supported by the results of this experiment?
a)
The rabbits’ genomes have a flexible response to environmental stimuli.
b)
The rabbits change their phenotypes to attract mates.
c)
Rabbits whose coat color does not change represent a more evolved species
d)
Increased ultraviolet light can alter the genome of these rabbits.
52.
In horses, the grey coat color (G) is dominant to non-grey coat color (g). Additionally, some horses have a genetic disorder called hyperkalemic periodic paralysis or HYPP. HYPP is an inherited autosomal dominant disorder that affects the sodium channels in muscle cells. HYPP (H) is dominant to the normal condition (h). If a non-grey, normal stallion sires a foal that is not grey and does not have HYPP, which of the following genotypes are possible genotypes for the mother?
a)
GGhh and ggHH
b)
ggHH and GgHh
c)
GGHH and GGHh
d)
GgHh and gghh
53.
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs
a)
crossing over
b)
mutagenesis
c)
hybridization
d)
fertilization
54.
What gamete possibilities could come from this parent's genotype?
a)
aB, ab, AB, Ab
b)
aB, Ab, AB, AB
c)
AB, aB, AB, Ab
d)
aB, ab, aB, ab
55.
What is commonly used to track the occurance of a particular trait in a family?
a)
Punnett squares
b)
Karyotypes
c)
Family trees
d)
Pedigrees
56.
Does this pedigree show a dominant or recessive trait?
a)
Dominant
b)
Recessive
57.
Mendel's Law of Segregation states that-
a)
Traits are inherited from parents at random.
b)
The dominant trait masks the recessive trait.
c)
Traits are independent from another.
d)
Each sex cell receives one alelle each during gamete formation when the gene separates.
58.
Which of Mendel's law states that "Alleles for one trait segregate independently from other genes for different traits in metaphase I of meiosis. "
a)
Law of Dominance
b)
Law of Independent Assortment
c)
Law of Segregation
d)
Law of Heredity
59.
A cross of a red cow with a white bull produces all roan offspring. This type of inheritance is known as
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
"breed time:
60.
What pattern of inheritance is shown in this pedigree?
a)
Autosomal Dominant
b)
Autosomal Recessive
c)
Sex Linked
61.
In the ABO blood group system in humans, if a person of type-B blood has children with a person of type-AB blood, what blood types could their children have?
a)
Type-AB, type-A, and type-B
b)
Type-A and type-B
c)
Type-B and type-AB
d)
Type-AB, type-A, type-B, and type-O
62.
Why are sex linked traits more common in males?
a)
They don't have the same immunity as females
b)
They only have 1 X chromosome
c)
They need 2 effected copies for expression
d)
1 X chromosome is inactivated
63.
X chromosome inactivation results in the __.
a)
total inactivation of both X chromosomes
b)
inactivation of only the paternal X chromosome
c)
inactivation of only the maternal X chromosome
d)
inactivation of either the paternal X chromosome or the maternal X chromosome
e)
nonrandom inactivation of X chromosomes in the initial cells of tissues
64.
A map that shows the positions of genes on a chromosome based on the frequency of crossing-over between the genes is called _______.
a)
Linkage Map
b)
Chromosomal map
c)
Non-Linkage map
d)
None of the above
65.
2.1.1 Genetic disorder caused by a recessive gene that codes for chlorine protein channels. Mutation leads to thick sticky mucous.
a)
Duchenne Muscular Dystrophy
b)
Cystic Fibrosis
c)
Huntington's Disease
d)
Down Syndrome
66.
2.1.1 Amniocentesis and Chorionic villus sampling are both procedures which test fetal cells during pregnancy for genetic disorders. These tests would be considered which of the following?
a)
Newborn screening
b)
Diagnostic testing
c)
Carrier testing
d)
Prenatal testing
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