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BIO 313 Final Review A
Supplemental Instruction
Iowa State University
Leader:
Course:
Instructor:
Date:
Laura
Bio 313
Dr. Rodermel
12/9/15
1. In which phase of meiosis can both of Mendel’s laws be observed?
a. Telophase
b. Metaphase I
c. Anaphase I
d. Anaphase II
2. How does the heterogametic sex differ from the homogametic sex
a. The heterogametic sex is male, the homogametic sex is female
b. Gametes of the heterogametic sex have different sex chromosomes; gametes of
homogametic sex have the same sex chromosome
c. Gametes of the heterogametic sex all contain a Y; gametes of the heterogametic sex
all contain an X chromosome.
3. Match the sex determination system with an organism that uses the system
XX-XO
Butterfly
XX-XY
Plants
ZZ-ZW
Turtles
Genic sex determination
Human
Environmental sex determination
Insect
4. What is the phenotype of a person who has XXXY sex chromosomes?
a. Klinefelter Syndrome
b. Turner Syndrome
c. Poly-X female
5. How many Barr bodies will a male with XXXYY chromosomes have in each of its cells?
a. 1
b. 2
c. 3
d. 4
6. If an F1 eggplant in figure 5.2 is used in a testcross, what proportion of the progeny from this
cross will be white?
a. All
b. ½
c. ¼
d. 0
7. How does incomplete dominance differ from incomplete penetrance?
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a. Incomplete dominance refers to alleles at the same locus; incomplete penetrance
refers to alleles at different loci
b. Incomplete dominance ranges from 0-50%; incomplete penetrance ranges from 51%
to 99%
c. In incomplete dominance, heterozygote is the intermediate between the homozygotes;
in incomplete penetrance, heterozygotes express phenotypes of both homozygotes
d. In incomplete dominance, the heterozygote is intermediate between the homozygotes;
in incomplete penetrance, some individuals do not express the expected phenotype
8. What type of epigenetic marker is responsible for genomic imprinting?
a. Acetylation
b. Lethal Alleles
c. Recombination
d. Methylation
9. A cross between two green corn plants yields 2/3 progeny that are green and progeny 1/3
progeny that are yellow. What is the genotype of the green progeny?
a. WW
b. Ww
c. ww
d. W_ (WW and Ww)
10. A number of all-white cats are crossed and they produce the following types of progeny:
12/16 all-white, 3/16 black, 1/16 gray. What is the genotype of the black progeny?
a. Aa
b. Aa Bb
c. A_B_
d. A_b_
11. Autosomal recessive traits often appear in pedigrees in which there have been consanguine
matings, because these traits
a. Tend to skip generations
b. Appear only when both parents carry a copy of the gene for the trait, which is more
likely when the parents are related
c. Usually arise in children born to parents who are unaffected
d. Appear equally in males and females
12. A male affected with an X-linked dominant trait will have what proportion of offspring
affected with the trait?
a. ½ sons, ½ daughters
b. All sons and no daughters
c. All daughters and no sons
d. ¾ daughters and ¼ sons
13. What assumptions underlie the use of adoption studies in genetics?
a. Adoptees have no contact with their biological parents after birth
b. The foster parents and biological parents not related
c. The environments of biological and adopted parents are independent
d. All of the above
14. Yellow is dominant to green and round is dominant to wrinkled.
a. What are the possible gametes from a yellow wrinkled parent and a green round
parent?
b. What would the phenotypic ratios of the F2 generation be?
15. If the genotype GgEeAAppX+Xc is crossed with the genotype ggEeaaPpX+Y. What is the
probability of the following offspring?
a. GgeeAapp X+Xc
b. ggEEAaPp Xc Y
c. GgEeAAppX+Y
16. Human blood types are A, AB, B, or O. Use this information to answer the following
questions
a. A man with AB blood is married to a woman with AB blood. What blood types will
their children be and in what proportion?
b. A man who has type B blood (genotype: BB) is married to a woman with type O
blood. What blood type will their children have?
c. A woman with type A blood (genotype: AO) is married to a type B person (genotype:
BO). What blood types will their children have?
d. A woman with type A blood is claiming that a man with type AB blood is the father
of her child, who is also type AB. Could this man be the father? Show the possible
crosses
17. Margaret has just learned that she has adult polycystic kidney disease. Her mother also has
the disease, as did her maternal grandfather and his younger brother (both of whom are now
dead). As far as Margaret knows, no one else in her extended family has the disease,
although she had a sister, Allison, who died in a car accident when she was 16 and might
have showed symptoms if she had lived long enough. Margaret is 42 years old and has three
children with her husband, Art. Anna is 20, Lydia is 18, and Tom is 15. Her husband’s name
is Art.
a. Draw a pedigree for this family
b. Could this disease be autosomal recessive? If so, is this mode of inheritance likely?
Explain.
c. Could this disease be autosomal dominant? If so, what is the chance that Lydia will
get the disease when she reaches middle-age?
d. Could this disease be X-linked recessive? Explain, using specific individuals in the
pedigree to support your answer
e. Could this disease be X-linked dominant? Explain, using specific individuals in the
pedigree to support your answer.