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Biology 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 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!

Page 1

Question 1 1. Alleles A and B are linked on chromosome 1 (such that you have A-B and a-b). Alleles C and D are linked on chromosome 2 (you have C-D and c-d). If a crossover event does not occur between either set of genes, which gamete genotype could NOT be produced by an individual heterozygous at each locus?

Question 2 2. 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 3 3. When two genes are located on the same chromosome, they are said to be _____.

Question 4 4. The locus is _____.

Question 5 5. An allele is _____.

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Question 6 6. When an organism is diploid, that means it has _____.

Question 7 7. A _____ is a cross between two individuals that are heterozygous at two loci.

Question 8 8.

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.

Question 9 9. The law of independent assortment states that:

Question 10 10. A scientist is studying an animal and determines that a gene is located on autosome two. It controls antler production in the male animals. Note that females do not produce antlers. This is an example of a:

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Question 11 11.

Which of the following statements is/are true?

I. A human with an X chromosome and a Y chromosome is male.

II. A human with only one type of sex chromosome (an X chromosome) is female.

III. All children of a color blind woman and a man who is not color blind will carry a color blind allele.

Question 12 12.

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

Question 14 14. The trait which is not expressed in a heterozygous state is known as

Question 15 15. What type of organism has two copies of every gene?

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Question 16 16. Skin cancer is a multifactorial trait. Which of the following is plausible?

Question 17 17.

Which of the following statement(s) accurately describes an advantage provided by model organisms?

I. The laboratory environment can be controlled.

II. True-breeding strains can be generated.

III. Specific combinations of alleles can be engineered.

Question 18 18. A _____ is a trait which is determined by two or more genes, but not any environmental factors.

Question 19 19. Which type of dominance describes a situation in which heterozygotes demonstrate a phenotype which is intermediate between the homozygotes?

Question 20 20. The following results were observed from a mating between two black and white speckled cats: 5 black cats, 12 black and white speckled cats, and 4 white cats. Which term describes the relationship between the alleles of the coat color gene?

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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. Which two laws of Mendel help us predict how chromosomes are allotted to the gametes?

Question 23 23. How many phenotypes are typically produced by a dihybrid cross?

Question 24 24. How would you define a dihybrid cross?

Question 25 25. Let's say P is an allele that codes for purple flowers and p is an allele that codes for white flowers. A plant has alleles Pp. According to the Law of Segregation, what alleles would each gamete have?

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Question 26 26. Gregor Mendel is famous for his involvement in _____.

Question 27 27. Based on Mendel's pea plants, if P is an allele that codes for purple flowers and p is an allele that codes for white flowers, what can you say about a plant that has the alleles Pp?

Question 28 28. If a strand of a DNA molecule has the sequence GTCCAC, what would be the sequence of the complementary section of DNA?

Question 29 29. The specific arrangement of nitrogenous bases in DNA is known as _____.

Question 30 30. DNA is a polynucleotide molecule consisting of the following nucleotides:

Biology 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 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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