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Principles of Genetics Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. What is the expression of a gene called?

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Question 2 2. What would be the expected ratio of genotypes in a cross between two parents who were both heterozygous?

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Question 3 3. What would be a possible genotype of an offspring if the parent's genotypes were AABBCC and aabbcc?

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Question 4 4. Which of the following statements about Gregor Mendel and his work is FALSE?

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Question 5 5. In 1900, what observation helped other scientists realize the significance of Mendel's work?

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Page 2

Question 6 6. In Mendel's law of segregation, alleles sort _____ because the gene is located on a specific _____ .

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Question 7 7. Which of the following would be considered recombinant DNA?

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Question 8 8. Which of the following statements is NOT true?

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Question 9 9.

Which of the following is/are examples of genetically modified organisms?

I. A plant cell in which a regulation gene has been deleted.

II. A bacterial cell in which extra copies of a bacterial DNA repair gene have been added.

III. A human cell that has been infected with a virus.

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Question 10 10. Do all cells replicate at the same rate?

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Page 3

Question 11 11. What happens when mistakes occur in replication?

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Question 12 12. What are the steps for replication?

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Question 13 13. The locus is _____.

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Question 14 14.

Which of the following statements is true?

I. The one-thousandth base pair on chromosome one of an organism is an example of a locus.

II. Changing the DNA in a gene by one base pair could create a new allele.

III. Cells in a diploid organism possess two copies of each chromosome (except gametes).

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Question 15 15. An allele is _____.

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Page 4

Question 16 16. Mendel's second law is also known as:

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Question 17 17.

Which of the following statements is true?

I. A dihybrid cross is a cross between individuals heterozygous at one gene.

II. The law of independent assortment describes the relationship between alleles of a single gene.

III. The law of segregation describes the manner in which genes on different chromosomes segregate.

IV. Homologous chromosomes segregate into different gametes.

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Question 18 18.

You could draw which of the following conclusions from a dihybrid cross which produces a 9:3:3:1 ratio of phenotypes?

I. The alleles of one gene sort independently of another gene.

II. The alleles of the two genes in question exhibit a simple dominant/recessive relationship.

III. The animals which were crossed were both homozygous with respect to at least one locus in question.

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Question 19 19. Because the same codons specify the same amino acids in nearly all organisms, we say that the genetic code is _____.

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Question 20 20. The ability of codons to match with the appropriate amino acids is called _____.

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Page 5

Question 21 21. Why can we manufacture insulin for humans with bacteria?

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Question 22 22. Which of the following is the process of transferring genetic information from DNA to RNA?

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Question 23 23. What is the term for a distinct section of DNA that codes for one protein?

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Question 24 24. The Central Dogma is a framework used to represent which of the following?

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Question 25 25. In a dihybrid cross between RrYy heterozygotes, what is the probability of the offspring genotype being YyRr?

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Page 6

Question 26 26. In a dihybrid cross between RrYy heterozygotes, what is the probability of the offspring genotype being RrYY?

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Question 27 27. The law of independent assortment is:

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Question 28 28. In a type of flower, red is dominant to white. What would be the expected phenotypes of the offspring if a cross was done between two white flowers?

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Question 29 29. Which of the following explains why bacteria DO NOT follow Mendel's First Law?

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Question 30 30. A scientist isolates a human DNA repair gene and inserts it into a plasmid. The plasmid is inserted into a bacterial cell, so more plasmid can be produced. After isolating the plasmid from the bacterial cells, the scientist inserts the plasmid DNA into a human tissue culture cell using a virus. Which of the following statements regarding HOSTS is TRUE?

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Principles of Genetics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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