BIO QUIZ

SEE ATTACHED, DUE TOMMROW

Biology 101 Section E803 – Guido J. Braem

BIOLOGY 103 – QUIZ # 3

Students please note: to each question, there is only a single correct answer. Click on the box to the left of the correct answer.

1. Children born to light-skinned women exposed to high levels of sunlight have a heightened risk of birth defects because

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a) UV radiation damages DNA.

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b) too much vitamin D is toxic.

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c) UV radiation breaks down folate.

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d) all of these.

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e) none of these.

2

. Which of the following would be the least satisfactory organism for genetic research?

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a) humans

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b) bacteria

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c) corn

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d) fruit flies

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e) peas

3. Progeria is caused by a(n)

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a) inherited recessive allele.

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b) inherited dominant allele.

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c) spontaneous recessive mutation.

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d) spontaneous dominant mutation.

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e) inherited sex-lined allele.

4. A human x-linked recessive gene may be

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a) found on the Y chromosome.

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b) passed to daughters from their fathers.

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c) passed to sons from their mothers.

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d) expressed more commonly among females

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e) passed to daughters from their fathers and to sons from their mothers.

5. Amniocentesis is

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a) a surgical means of repairing deformities.

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b) a form of chemotherapy that modifies or inhibits gene expression or the finction of gene products.

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c) used in prenatal diagnosis to detect chromosomal mutations and metabolic disorders in embryos.

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d) a form of gene replacement theory.

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e) all of the above.

6. Which of the answers below is NOT a related condition in which abnormal numbers of chromosomes are present ?

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a) monosomy

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b) Down syndrome

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c) nondisjunction

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d) complete chromosome set

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d) trisomy

7. The number of species on an island depends on the size of the island and its distance from a mainland. The statement would most likely be made by

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a) an explorer.

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b) a biogeographer.

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c) a geologist.

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d) a philosopher.

8. Sexual selection, such as occurs when males compete for access to fertile females, frequently influences aspects of body form and can lead to

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a) male/female differences.

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b) male aggression.

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c) exaggerated traits.

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d) all of the above.

9. Which of the following tends to keep populations of a species similar to one another?

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a) Genetic drift

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b) Gene flow

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c) Mutation

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d) Natural selection

10. In cladograms, sister groups are

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a) inbred.

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b) the same age.

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c) represented by nodes.

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d) in the same family.

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