MCAS STE Biology: Genetics & Heredity 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 yellow "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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Question 1 1. _____ mutations result in a longer DNA strand.

Question 2 2. Gregor Mendel proposed which of the following concepts?

Question 3 3. The law of independent assortment states that:

Question 4 4. Consider the following experiment: A scientist determines that the number of dorsal spines of her experimental fish is determined by a single locus. She mates a fish with 1 dorsal spine with a fish of the same species with 2 dorsal spines. The mating produces ten fish, which all have 1 dorsal spine. Which of the following statements does not fit with this result?

Question 5 5.

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 6 6. Which enzyme checks DNA for errors?

Question 7 7. How do mutagens cause mutations?

Question 8 8.

Hemophilia is an X-linked recessive trait. Consider a cross between a woman who is a carrier and a man who suffers from hemophilia. Which of the following statements is/are true?

I. All sons of these parents will be a hemophiliac.

II. A son who suffers from hemophilia received the hemophilia allele from his mother.

III. Half of the daughters of this cross are predicted to be hemophiliacs.

Question 9 9. Joe is in urgent need of a blood transfusion. His blood genotype is AA. Mike has an oo genotype, and Mary has a BB genotype. Who would be able to donate blood to Joe, and why?

Question 10 10. Mendel's study of what plant eventually revolutionized the understanding of heredity?

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Question 11 11. In humans, _____ is determined by the presence or absence of the _____ chromosome.

Question 12 12. What is the expression of a gene called?

Question 13 13. What kind of mutation causes sickle-cell anemia?

Question 14 14. All of the following statements are correct EXCEPT:

Question 15 15. How would a shift in the reading frame likely alter the resulting protein?

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Question 16 16. Which of the following is NOT an example of a phenotype?

Question 17 17. Which of the following statements does NOT help explain Mendel's law of segregation?

Question 18 18. Based on the original sequence, ACTTGAC, which of the following answer choices includes a transition mutation?

Question 19 19. When two genes are located on the same chromosome, they are said to be _____.

Question 20 20. Which of the following is NOT an example of a homozygous genotype?

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Question 21 21. Which phenotype(s) do the red blood cells from a person with AB blood type exhibit?

Question 22 22. The trait which is not expressed in a heterozygous state is known as

Question 23 23. What would be the expected ratio of genotypes in a cross between two parents who were both heterozygous?

Question 24 24. Alleles A, B, C and D are linked on one chromosome, and alleles a, b, c and d are linked on the homolog. During meiosis, a crossover event occurs between genes A and B. Which of the following is an example of a chromatid that could be found in one of the resulting gametes?

Question 25 25. Tay-Sachs disease results from a buildup of harmful chemicals in the

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Question 26 26. Which type of mutations can result in a frameshift?

Question 27 27.

Genes A and B are located on the same chromosome arm in the following orientation: centromere, gene A, gene B, telomere. Which of the following recombinant chromatids could be produced by a crossover event between B genes in a heterozygote in which the dominant alleles are linked on one homolog and the recessive ones are linked on the other homolog?

I. A B

II. a B

III. A b

IV. a b

Question 28 28. In pea plants, having smooth pods is dominant to having wrinkled ones. What would be an explanation for wrinkled pods showing up if both parents were smooth?

Question 29 29. In 1900 the observation of what helped other scientists realise the significance of Mendel's work?

Question 30 30. A type of point mutation that alters the length of the DNA strand is _____.

MCAS STE Biology: Genetics & Heredity 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 yellow "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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