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Patterns of Genetic Inheritance 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. The trait which is expressed in a heterozygous state is known as

Question 2 2. Which of the following is NOT an example of a homozygous genotype?

Question 3 3. The trait which is not expressed in a heterozygous state is known as

Question 4 4. A _____ is a trait which is determined by two or more genes, but not any environmental factors.

Question 5 5. Skin cancer is a multifactorial trait. Which of the following is plausible?

Page 2

Question 6 6. Which of the following statements could NOT be used to describe a multifactorial trait?

Question 7 7. Which phenotype(s) do the red blood cells from a person with AB blood type exhibit?

Question 8 8. 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?

Question 9 9. Incomplete dominance governs the pigment gene of a flower. A mating between heterozygotes yields the following phenotypic ratio: 15 red flowers, 32 pink flowers and 14 white flowers. Which statement describes the situation?

Question 10 10. Autosomes are:

Page 3

Question 11 11. 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:

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 phenotype?

Question 14 14. When an organism is diploid, that means it has _____.

Question 15 15.

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 homolog (except gametes).

Page 4

Question 16 16. A Punnett square is useful when determining phenotypic output, for all of the following reasons EXCEPT:

Question 17 17. Which two laws of Mendel help us predict how chromosomes are allotted to the gametes?

Question 18 18.

You have the following alleles: B=blue, b=green, H=two-horned and h=one-horned:

Which of the following crosses most likely produced the following results?

54 blue, two-horned lizards

18 blue, one-horned lizards

18 green, two-horned lizards

6 green, one-horned lizards

Question 19 19. Mendel's second law is also known as:

Question 20 20.

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.

Page 5

Question 21 21. The law of independent assortment states that:

Question 22 22. Some people have blue eyes and some people have brown eyes. Which answer best explains why this is the case?

Question 23 23. Gregor Mendel is famous for his involvement in _____.

Question 24 24. 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?

Question 25 25. When two genes are located on the same chromosome, they are said to be _____.

Page 6

Question 26 26. 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 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. What type of organism has two copies of every gene?

Question 29 29.

Evaluate each of the following sets of data separately. Which of them provide evidence that the trait is polygenic?

I. The genotype at loci A, B and C each produces a protein that influences the length of an organism by an average of 0.6, 0.4 and 0.3 cm, respectively.

II. Three different alleles of gene D affect the length of an organism by an average of 0.6, 0.4 and 0.3 cm, respectively.

III. Loci E, F and G each modulates an independent pathway, which plays a role in determining the length of an organism.

Question 30 30. 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?

Patterns of Genetic Inheritance 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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