Essential Genetics: A Genomics Perspective, Fourth Edition: Practice Quizzes

Bears

Title Text: Essential Genetics: A Genomics Perspective, Fourth Edition, Daniel L. Hartl and Elizabeth W. Jones

Please read each question and select your answer from the choices provided. You must complete all of the questions in order to view your results. At the end of each exam, you have the option to e-mail your results to your instructor.

1: Mating of two organisms produces a 3:1 ratio of phenotypes in the progeny. The parental genotypes are
	A: Aa x aa
	B: Aa x Aa
	C: AA x aa
	D: AA x AA
	E: aa x aa

2: Mating a heterozygous individual with a recessive homozygote is called a
	A: Complementation test
	B: Dihybrid cross
	C: Ames test
	D: True-breeding cross
	E: Testcross

3: In families where one parent is homozygous for a recessive trait and the other is heterozygous, what is the probability of their having a child with the homozygous recessive genotype?
	A: 0
	B: 0.25
	C: 0.5
	D: 0.75
	E: 1

4: Assuming independent assortment, how many different gametes can be formed by an organism that is homozygous for 5 and heterozygous for 2 genes
	A: 10
	B: 7
	C: 5
	D: 4
	E: 2

5: In a complementation test, if the combination of two recessive mutations results in a wildtype phenotype, then the mutations are regarded as
	A: alleles of the same gene
	B: codominant
	C: epistatic
	D: alleles of different genes
	E: pleiotropic

6: Two parents with blood types A and B have a child who has 0 blood type. What is the chance that their next child will be B?
	A: 1
	B: 0.75
	C: 0.5
	D: 0.25
	E: 0

7: Among sibships consisting of two children, and assuming a sex ratio of 1:1, what is the proportion with no girls?
	A: 0
	B: 0.25
	C: 0.5
	D: 0.75
	E: 1

8: Probabilities are calculated using the multiplication rule when they
	A: Are mutually exclusive
	B: Are independent
	C: Occur disproportionately
	D: Are equally likely

9: In the cross AABB x aabb, F2 progeny is produced in a phenotypic ratio of 13:3. What does this deviation from the expected 9:3:3:1 indicate?
	A: Epistasis
	B: Complementation
	C: Codominance
	D: Pleiotropy

10: In a testcross of Aa Bb Cc DD Ee, where the genes show independent assortment, what is the expected frequency of aa bb cc Dd ee progeny?
	A: 0.0625
	B: 0.125
	C: 0.25
	D: 0.5
	E: 1

Optional: Enter your name and your instructor's E-mail address to have your results E-mailed to him or her.
Your Name:
Instructor's E-mail Address:
Your E-mail Address:

Jones and Bartlett Biological Sciences Home | Sign up for eUpdates | Educators: Learn more about this title

© Copyright 2006 Jones and Bartlett Publishers | Contact Technical Support