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WorksheetsTest - Genetics
Total questions: 45
Worksheet time: 3hrs 22mins
Name
Class
Date
1.
Heredity can be defined as
a)
A characteristic that an organism can pass onto its offspring through its genes.
b)
the passing of traits from parent to offspring.
c)
the scientific study of phenotypes.
d)
none of the answers are correct.
2.
Which of the following is a genetic cross between two purebred pea plants?
a)
Tt x Tt
b)
Tt x tt
c)
TT x tt
d)
None of the answers are correct
3.
Dominant alleles can be defined as
a)
alleles that mask or hide other alleles, such as the “tall” allele
b)
alleles that are masked, or covered up when there is another dominant allele.
4.
An example of a homozygous recessive allele pair can be:
a)
Rr
b)
rr
c)
RR
d)
none of the answers are correct
5.
An example of a heterozygous dominant allele pair can be:
a)
rr
b)
RR
c)
Rr
d)
none of the answers are correct
6.
An example of a homozygous dominant allele par can be:
a)
TT
b)
Tt
c)
tt
d)
none of the answers are correct
7.
How are genes represented within scientific context?
a)
scientists refer to the “factors” that control traits as genes. Genes are represented by the phenotype of the plant, e.g. Tall Plant
b)
scientists refer to the “factors” that control traits as genes. Genes are represented by the allele present within the organisms, e.g. Tt
c)
scientists refer to the “factors” that control traits as genes. Genes are identical copies of the parent offspring.
d)
None of the answers are correct
8.
How can a tall pea plant crossed with another tall pea plant produce four offspring, within which 3 of the offspring are are tall, but one of the pea plants is short?
a)
One of the pea plants is homozygous recessive, while the other pea plant is homozygous recessive. This cross of pea plants would produce 3 offspring that are tall, but one of the pea plants is short.
b)
One of the pea plants is heterozygous dominant, while the other pea plant is homozygous dominant. This cross of pea plants would produce 3 offspring that are tall, but one of the pea plants is short.
c)
One of the pea plants is heterozygous dominant, while the other pea plant is heterozygous dominant. This cross of pea plants would produce 3 offspring that are tall, but one of the pea plants is short.
d)
none of the answers are correct.
9.
An organism with two different alleles for a trait is said to be:
a)
recessive
b)
hybrid
c)
dominant
d)
purebred
10.
An allele whose trait is masked in the presence of a dominant allele is
a)
Dominant
b)
Hybrid
c)
Purebred
d)
Recessive
11.
The letter P in a "P" Generation stands for:
a)
Probability
b)
Puppy
c)
Punnet
d)
Parent
12.
Heterozygous alleles are also considered to be:
a)
Hybrid
b)
Purebred
c)
Phenotype
d)
Genotype
13.
Homozygous Alleles are also considered to be
a)
Purebreds
b)
Hybrids
c)
Genotype
d)
Phenotype
14.
Dog breeders around the world want to breed certain traits within dogs. One dog, for instance, can have both the floppy ear genetic trait (tt), and a straight ear genetic trait (Tt or TT).
Mrs. Lloyd is a dog breeder who knows that her dog has the floppy ears gene (tt), but wants all of her dogs future offspring to have straight ears. What type of genotype would the other dog have to have inherited for Mrs. Lloyd's dog to reproduce puppy's with the straight ear gene?
Mrs. Lloyd is a dog breeder who knows that her dog has the floppy ears gene (tt), but wants all of her dogs future offspring to have straight ears. What type of genotype would the other dog have to have inherited for Mrs. Lloyd's dog to reproduce puppy's with the straight ear gene?
a)
Mrs. Lloyd would have to breed her dog with a dog that has homozygous dominant gene trait. This means that if you cross a homozygous dominant allele pair and a homozygous recessive allele pair, the future offspring will have a 100 percent chance to have the straight ear gene.
b)
Mrs. Lloyd would have to breed her dog with a dog that has heterozygous dominant gene trait. This means that if you cross a heterozygous dominant allele pair with a homozygous recessive allele pair, the future offspring will have a 100 percent chance to have the straight ear gene.
c)
Mrs. Lloyd would have to breed her dog with a dog that has homozygous recessive gene trait. This means that if you cross a homozygous recessive allele pair and a homozygous recessive allele pair, the future offspring will have a 100 percent chance to have the straight ear gene.
d)
The dog is unable to have straight eared puppies, but the puppies future offspring may be able to breed straight eared puppies.
15.
What is the difference between genotype and phenotype?
a)
genotype is detectable expression of the genotype. An expressed and observable trait. e.g. hair color. on the other hand, phenotype is The genetic makeup of an individual. Refers to the information contained on two alleles in the cell.
b)
Hair color, eye color, weight, and the ability to roll one's tongue are examples of genotype. Phenotype is a section of DNA that may be susceptible to disease.
c)
phenotype is the detectable expression of the genotype. It is also an expressed or an observable trait, e.g. hair color. Genotype is the genetic makeup of an individual. Refers to the information contained on two alleles in the cell, e.g. TT, tt, Tt
d)
none of the answers are correct.
16.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
17.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
18.
What is the purpose of using a pedigree?
a)
To determine the average age of a family
b)
To find out family histories and medical records
c)
To find out whether a couple can have a boy or a girl
d)
To trace the inheritance of a certain trait through generations
19.
How many PAIRS of chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
20.
I have 2 X chromosomes. What am I?
a)
Male
b)
Female
21.
I have 1 X chromosome and 1 Y chromosome. What am I?
a)
Male
b)
Female
22.
What percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%
23.
What percentage of the offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
24.
Looking at this pedigree, how many female family members are carriers?
a)
1
b)
3
c)
10
d)
7
25.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
26.
A man with type O blood is accused of being the father of a type B baby. The mother is type A. Could this man be the father?
a)
Yes
b)
No
27.
What determines gender in humans?
a)
the X and Y chromosome
b)
chromosome 21
c)
codominance
d)
epistasis
28.
Which term(s) best describes the inheritance of human blood types?
a)
incomplete dominance and multiple alleles
b)
codominance and epistasis
c)
codominance and multiple alleles
d)
incomplete dominance and codominance
29.
What are the blood types of the possible children that a woman (type O) and man (type AB) can have?
a)
O and AB
b)
O and A
c)
O and B
d)
A and B
30.
If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true? Make a punnett square!
a)
All sons will have hemophilia
b)
all daughters will have hemophilia
c)
50% of daughters and 50% of sons have hemophilia
d)
100% of sons have hemophilia and 100% of daughters are carriers
31.
The genotype of the affected son and daughter at the bottom of this pedigree would have to be ________________ if the disease is recessive?
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
Can't tell
32.
_______________ results in a phenotype that is a blend of a certain trait in an allele pair.
a)
Co-dominance
b)
Sex-linked traits
c)
genetic mutations
d)
incomplete dominance
33.
An example of incomplete dominance can be:
a)
If a homozygous dominant red flower (RR) breeds with a homozygous dominant blue flower (BB), the F-1 offspring's phenotype will have red flowers with blue dots, or blue flowers with red dots.
b)
If a homozygous dominant red flower (RR) breeds with a homozygous dominant blue flower, the F-1 offsprings phenotype will have either blue flower, or red flower. This is dependent on which flower if more dominant.
c)
If a homozygous dominant red flower (RR) breeds with a homozygous dominant blue flower (BB), the F-1 offspring's phenotype will have all purple flowers. This is due to the incomplete dominance of both the blue and red flower's genotypes.
d)
none of the answers are correct.
34.
SpongeBob and his pal Patrick love to go jellyfishing at Jellyfish Fields! The fields are home to a special type of green jellyfish known as Goobers and only really great jellyfishermen are lucky enough to catch some on every trip. Many of the jellyfish are yellow (YY) or blue (yy), but some end up green as a result of incomplete dominance. Use this information to help you complete each section below.
I.) If Spongebob and Patrick bred a yellow (YY) jellyfish, and a blue (yy) jellyfish, what would be the probability that there would be offspring the color green due to incomplete dominance? Create a punnet square to complete the assigned task.
I.) If Spongebob and Patrick bred a yellow (YY) jellyfish, and a blue (yy) jellyfish, what would be the probability that there would be offspring the color green due to incomplete dominance? Create a punnet square to complete the assigned task.
a)
The probability that the offspring is green would have to be 25%, this is due to the incomplete dominance found in the yellow jellyfish and the blue jellyfish.
b)
The probability that the offspring is green would have to be 50%, this is due to the incomplete dominance found in the yellow jellyfish and the blue jellyfish.
c)
The probability that the offspring is green would have to be 75%, this is due to the incomplete dominance found in the yellow jellyfish and the blue jellyfish.
d)
The probability that the offspring is green would have to be 100%, this is due to the incomplete dominance found in the yellow jellyfish and the blue jellyfish.
35.
A married couple from Africa decided to move to the United States of America. Before they moved to the United States of America, they found out that they were expecting a child. The parents decided that when they move to America, they will test the child for Sickle Cell Anemia. The father had the sickle cell trait (Ss), with no signs or symptoms of the disease. The mother also had the sickle cell trait (Ss), with no signs or symptoms of the disease.
A.) If the allele pair above, Ss, is the incomplete dominance trait, what would the genotype be if the father had "Sickle Cell Disease"?
A.) If the allele pair above, Ss, is the incomplete dominance trait, what would the genotype be if the father had "Sickle Cell Disease"?
a)
The Father's Genotype, if he has Sickle Cell Disease, would be ss.
b)
The Father's Genotype, if he has Sickle Cell Disease, would be SS.
c)
The Father's Genotype, if he has Sickle Cell Disease, would be Ss.
d)
None of the answers are correct
36.
A married couple from Africa decided to move to the United States of America. Before they moved to the United States of America, they found out that they were expecting a child. The parents decided that when they move to America, they will test the child for Sickle Cell Anemia. The father had the sickle cell trait (Ss), with no signs or symptoms of the disease. The mother also had the sickle cell trait (Ss), with no signs or symptoms of the disease.
B.) What is the percent chance that their children will inherit the sickle cell disease due to incomplete dominance?
B.) What is the percent chance that their children will inherit the sickle cell disease due to incomplete dominance?
a)
The percent chance that any of the children will receive "Sickle Cell Disease" is 25%
b)
The percent chance that any of the children will receive "Sickle Cell Disease" is 50%
c)
The percent chance that any of the children will receive "Sickle Cell Disease" is 75%
d)
The percent chance that any of the children will receive "Sickle Cell Disease" is 100%
37.
How many alleles does an individual have for each trait?
a)
1
b)
2
c)
3
d)
4
38.
What type of inheritance do two alleles have if their traits blend together?
a)
Incomplete Dominance
b)
Co-Dominance
c)
Mendelian Inheritance
d)
Homozygous Inheritance
39.
A pattern of inheritance in which a trait is carried on one of the sex-determining chromosomes.
a)
Mendelian Inheritance
b)
Co-dominance
c)
Incomplete dominance
d)
Sex-linked inheritance
40.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
41.
A roan cow shows co-dominance in fur color (orange and white). What is the phenotype ratio expected if a roan cow and a roan steer (organ and white) mate together?
a)
4: Orange and White
b)
1: Orange : 1 White
c)
2 Orange: 2 Orange and White: 0 White
d)
1: Orange: 2 Orange and White: 1 White
42.
How are Incomplete Dominance and Co Dominance different than a normal Mendelian cross?
a)
There is no difference
b)
The heterozygous genotype has a unique phenotype
c)
There is no heterozygous genotype
d)
There is only one phenotype regardless of genotype.
43.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
44.
Colorblindness is a recessive, X chromosome sex-link disorder. Cross the parents to figure out which percentage of their offspring will be colorblind.
a)
25%
b)
0%
c)
75%
d)
50%
45.
Hemophilia is a sex-linked recessive trait found on the x chromosome. Complete a cross between a woman who is a carrier and a man who is normal.
What are the chances, if they have a daughter, that she is a carrier?
What are the chances, if they have a daughter, that she is a carrier?
a)
100%
b)
75%
c)
50%
d)
25%
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