Download 1. Polygenic inheritance is: A. one gene controlling many phenotypic

Unit 2 Assessment
1. Polygenic inheritance is:
A. one gene controlling many phenotypic traits
B. one phenotypic trait controlled by multiple genes
C. illustrated by height and eye color
D. B and C
E. none of the above
2. If you cross a true-breeding purple flowered plant with a truebreeding white flowered plant and get pink flowers, your result is
most likely an example of:
A. codominance
B. epistasis
C. incomplete dominance
D. polygenic inheritance
E. complete dominance
3. If you conduct a dihybrid cross and get a ratio of 9:7, you could
conclude that:
A. the traits under examination are impacted by epistasis
B. the traits under examination are polygenic
C. the traits under examination are codominant
D. all of the above
E. you can’t conclude anything comfortably
4. In fruit flies, white eyes are x-linked recessive. If you cross a
white-eyed female and a red-eyed male, what percentage of your
female offspring will have white eyes?
A. 100%
B. 50%
C. 25%
D. 0%
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5. Hemophilia is an x-linked recessive disease, otherwise known
as the “royal disease.” If you crossed a carrier female with a
hemophiliac male, what is the likelihood that your female offspring
will have hemophilia?
A. 0%
B. 25%
C. 50%
D. 75%
E. 100%
6. Blood type can be either O, A, B, or AB. A and B are dominant
to O, yet they are codominant to each other. If you crossed an
individual with the blood type of O with A, what would the blood
type be of the offspring?
A. All of the offspring would be A
B. All of the offspring would be O
C. Half of the offspring would be A, and half would be O
D. You can’t tell from the information given here
E. Either A or C
7. Red-green colorblindness is a sex-linked recessive trait. Which
of the following statements is true?
A. Women carriers will not be colorblind
B. There are more colorblind men than women
C. Women carriers will be colorblind
D. There are more colorblind men then women
E. None of the above
8. Which of the following is not a chromosomal abnormality?
A. deletion
B. insertion
C. duplication
D. insertion
E. all of the above are potential chromosomal abnormalities
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9. If you have an initial gene sequence of DFEBA, and you
conduct a controlled test cross in your F1 and notice that your
offspring have a gene sequence of DFEFEBA, which mutation
has occurred?
A. duplication
B. deletion
C. inversion
D. deletion
10. Barr bodies are believed to be:
A. extra new copies of chromosomes
B. inactivated x chromosomes in female mammals
C. responsible for a genetic disease
D. none of the above
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