BIO QUIZ

Attached, you will find Quiz #2.  DO NOT CHANGE THE FORMAT. All modern text editors have means to handle the WORD for WINDOWS format. Complete the quiz by Sunday 30 June 2013 midnight (German time = Greenwich + 1) and upload it via the assignment folder. Make sure the quiz is physically uploaded (by checking that yourself) ! Again, make sure the Quiz format is not changed!     

Biology 101 Section E803 – Guido J. Braem

BIOLOGY 103 – QUIZ #

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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. What are the base-pairing rules for DNA?

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a) A-G, T-C

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b) A-C, T-G

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c) A-U, C-G

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d) A-T, G-C.

2. Anticodons pair with

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a) mRNA codons.

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b) DNA codons

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c) RNA anticodons.

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d) amino acids.

3. A duplicated chromosome has

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a) two chromatids.

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b) four chromatids

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c) eight chromatids.

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d) one chromatid.

4. Crossing over mixes up

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a) chromosomes

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b) alleles

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c) zygotes.

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d) gametes

5. The stage of meiosis that makes the descendent cells haploid is

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a) prophase I.

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b) prophase II.

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c) anaphase I.

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d) anaphase II.

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e) methaphase I.

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f) metaphase II.

6. Assuming complete dominance, crosses between two dihybrid F1 pea plants, which are offspring from a cross AABB aabb, result in F2 phenotypic ratios of

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a)1:2:1.

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b) 3:1.

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c) 1.1.1.1.

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d) 9:3:3:1.

7. A gene that affects three traits is

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a) epistatic.

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b) a multiple allele system.

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c) pleiotropic.

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d) dominant.

8. The probability of a crossover occurring between two genes on the same chromosome

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a) is unrelated to the distance between them.

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b) decreases with the distance between them.

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c) increases with the distance between them.

9. Which of the following is one of the very important differences between mitosis and meiosis?

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a) Chromosomes align midway between spindle poles only in meiosis.

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b) Homologous chromosomes pair up only in meiosis.

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c) DNA is replicated only in mitosis.

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d) Sister chromatids separate only in meiosis.

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e) Interphase occurs only in meiosis.

10. The main evolutionary advantage of sexual over asexual reproduction is that it produces

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a) more offspring per individual.

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b) more variation among offspring.

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c) healthier offspring.

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