Download Honors Biology - ahs-guntherbiology-2009

Name ___________________________
Score ________________
Date ______________________
Quiz: Patterns of Inheritance
Honors Biology
__________1. In a certain variety of chicken, the genes for black feather color and the genes for
white feather color are co-dominant. This variety of chicken will most likely
have:
a. three possible phenotypes for feather color.
b. white feather color, only
c. only two genotypes for feather color
d. black feather color, only
__________ 2. In fruit flies, red eye color (R) is dominant and white eye color (r) is recessive.
The allele or eye color is carried on the X-chromosome. Which cross would most
likely produce 50% white-eyed males and 50% red-eyed males?
a. XRXR x XRY
b. XRXr x XrY
R R
r
c. X X x X Y
d. XrXr x XRY
__________ 3. F represents the gene for brown coat color and f represents the gene for white
coat color. In the cross FF x ff, all the offspring have a brown coat. Which genetic
principle is illustrated by this cross?
a. crossing-over
b. codominance
c. multiple alleles
d. dominance
__________ 4. What does the Law of Independent Assortment state?
a. Gene pairs always stay together.
b. Half of the organism’s gametes have one allele per pair.
c. Gene pairs segregate randomly and independently of each other.
d. One allele is always dominant.
__________ 5. Because the sickle cell gene affects more than one trait, it is an example of
____________.
a. Polygenetic trait
b. multiple allele
c. pleiotropy
d. incomplete dominance
__________ 6. Which of the following genotypes result in the same phenotype?
a. IAIA and IAIB
b. IBIB and IAIB
B B
B
c. I I and I i
d. IBi and ii
___________ 7. Eye color, which involves many genetic factors, is an example of ___________.
a. Polygenetic trait
b. multiple allele
c. pleiotropy
d. epistasis
Use the pedigree diagram below to answer questions 8 – 10.
Homozygous dominant
Homozygous recessive
I
II
III
The pedigree chart above shows the incidence of hemophilia over three generations of a family.
__________ 8. Individuals II-1 and II-4 in the pedigree chart can be classified as:
a. Homozygous dominant
c. Homozygous recessive
b. Mutants
d. Carriers
__________ 9. If individual III-2 marries a person with the same genotype as individual I-1, what is
the chance that one of their children will be born with hemophilia?
a. 0%
b. 25%
c. 50%
d. 75%
__________ 10. What type of inheritance pattern is represented by the shaded symbols?
a. incomplete dominance
c. codominace
b. multiple alleles
d. sex-linked inheritance
___________ 11. Total colorblindness is a rare condition that is inherited as a recessive trait.
Affected persons see the world only in shades of gray and can see best in dim light or
in the dark. A woman whose father is totally color-blind intends to marry a man
whose mother was totally color-blind. What are the chances that they will produce a
affected offspring?
a. 0%
b. 25%
c. 50 %
d. 100%
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Name______________________
Honors Biology
Date_____________
__________ 12. In Laborador retrievers, coat color is controlled by two genes. Black coat color
(B) is dominat to brown coat color (b). However, dogs that are homozygous
recessive at another unlinked gene (e) are yellow. A dog that has genotype EdBb
(black) is bred with another dog whose genotype is eebb (yellow). What is the
expected ratio of black:brown:yellow offspring?
a. 9 : 4 : 3
b. 9 : 3 : 1
c. 9 : 0 : 7
d. 1 : 1 : 2
___________ 13. What is the probability of flipping a coin four times and getting all tails?
a. 1/3
b. 1/8
c. 1/32
d. 2/5
___________ 14. Lobed ears are dominant to attached ears in humans. What results are
predicted in a cross between two hybrid humans?
a. 100% lobed
b. 50% lobed, 50% attached
c. 75% lobed, 25% attached
d. 25% lobed, 25% attached, 50% in between
___________ 15. In order to determine whether an animal is expressing a dominant trait that is
pure or hybrid, geneticists conduct a _____________.
a. P x F cross
b. F x F cross c. test cross d. recessive cross
___________ 16. The genes for red hair and freckles are usually inherited together because these
genes are:
a. homologous
b. linked
c. sorted independently
d. hybrid traits
____________ 17. Because the gene for red-green colorblindness is located on the X
chromosome, it is NOT normally possible for a _____.
a. carrier mother to pass the gene on to her daughter
b. carrier mother to pass on the gene on to her son
c. colorblind father to pass on the gene on to his daughter
d. colorblind father to pass on the gene on to his son
Short Answer
1. What would the gametes be by an organism with the genotype AaBbcc? (1 point)
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Name______________________
Honors Biology
Date_____________
2. All of the offspring of a purebred black dog and a purebred white dog are grey. Identify the
type of inheritance this cross illustrates. Give the genotypes of the parents and show the cross. (3
points)
3. In guinea pigs rough coat (R) is dominant to smooth (r). A rough-coated guinea pigs is bred
to a smooth one, giving 8 rough and 7 smooth offspring in the F1 generation (2 points).
a. What are the genotypes of the parents and their offspring?
b. If one of the rough F1 guinea pigs is mated to its rough parent, what offspring would
you expect?
4. What is the probability of someone tossing a coin and getting heads, and then rolling two die
and getting a 5 and a 6? (1 point)
5. Phenylthiocarbamide is a molecule with a bitter taste. Ability to taste PTC is a dominant trait.
A taster and a non-taster have four children, all of whom can taste PTC. What is the most
probable genotype of the parent who is a taster? Is there another possibility? What is the
probability that this alternative genotype is correct? (3 points)
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Name______________________
Honors Biology
Date_____________
Two pedigree diagrams are shown below. One shows inheritance of a dominant trait. One shows
inheritance of recessive trait. Use the diagrams to answer question 6. (Note: carriers are not
noted in the diagram.)
#1
#2
6. Which pedigree shows inheritance of a recessive trait (#1 or #2)? How do you know? Give a
specific example from the chart to support your answer. (3 points)
7. A woman who has unusually short fingers marries a man who has fingers of normal
length, and they have four children, two of each sex. One of their sons and one of
their daughters have unusually short fingers. (4 points)
a. Draw the pedigree.
b. According to your pedigree, could short finger length be a dominant trait?
Explain.
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Name______________________
Honors Biology
Date_____________
8. Below is a pedigree for an inherited heart disease. This gene is inherited on an autosomal
chromosome.
Carrier
C
A
?
B
a. What is the probability that person B would have the inherited heart disease? (Use a Punnett
square to help you).
b. What is the genotype person A?
c. What are the genotypes of the offspring between persons A and C?
d. Could persons A and C produce a child with the inheritable heart disease gene expressed?
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