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Genetics Test Form-A
Multiple Choice: Identify the choice that best completes the statement or answers the question.
R
r
R
RR
Rr
r
Rr
rr
R= red fur
r = white fur
Use the Punnett Square to answer the following questions
1. What is the genotype of the heterozygous offspring?
A) rr
B) Rr
c) RR
D) none of these
2. What is probability for an offspring to have red fur?
A) 3/4
B) 2/4
c) 1/4
D) 4/4
3. What will the phenotype be of the offspring with the genotype rr?
A) red fur
B) pink fur
c) white fur
D) cannot be determined
4. A black guinea pig has a genotype of BB and a white guinea pig has a genotype of bb. If black is
the dominate gene and we crossed these two guinea pigs, what percent of their offspring will
have black fur?
A) 25%
B) 50%
c) 75%
D) 100%
5. A male mouse (Bb) is bred with a female mouse (bb). The dominate gene is black and the
recessive gene is brown. Which Punnett Square shows the correct genotype for the offspring of
the mice?
A)
Bb
Bb
Bb
Bb
B)
Bb
Bb
Bb
Bb
C)
Bb
Bb
bb
bb
6. Scientists call an organism that has two different alleles for a trait a
A) hybrid
B) trait
C) purebred
D) factor
7. Is it possible for a son to inherit an allele on an X chromosome from his father?
A) Yes because you receive one chromosome from each parent
B) No because males are YY
C) Yes because males are XX
D) No because males only have one X chromosome that comes from their mother.
8. An organism’s physical appearance is its
A) genotype
B) phenotype
C) codominance
D) heterozygous
The following chart is a pedigree that shows how a dominant trait, X-ray vision is
inherited within a family.
9. How many males in the first generation have x-ray vision?
A) 3
B) 2
C) 1
D) 0
10. What is the genotype of the third generation female?
A) ee
B) Ee
C) EE
D) cannot be determined
11. How many marriage/mating are represented on this family pedigree?
A) 2
B) 4
C) 6
D) 8
12. What is the genotype of the third generation male?
A) Ee
B) EE
C) ee
D) EeE
13. Gregor Mendel crossed a yellow pea plant with a green pea plant. The offspring of these plants
were all green. Which statement best describes how this occurred?
A) yellow is dominant
B) green is recessive
C) green and yellow blend
D) green is dominant
14. Which of the following are listed from largest to smallest?
A) DNA-gene-cell- chromosomes-nucleus
B) cell-nucleus-chromosomes-DNA-nitrogen bases
C) nucleus-cell-chromosome-gene-DNA
D) cell-nucleus-gene-nitrogen bases-chromosomes
15. In which type of reproduction are 2 parents necessary?
A) asexual
B) disexual
C) monosexual
D) sexual
16. Which process produces sex cells?
A) Mytoeses
B) Miboates
D) Meiosis
C) Mitosis
17. The passing of traits from parents to offspring is called __.
A) codominance
B) incomplete dominance
18. An organism that has two identical alleles for a trait is
A) codominant
B) tall
C) homozygous
C) inheritance
D) heterozygous
A blue-eyed man, who has two brown-eyed parents, gets married to a brown-eyed woman. The
man and the woman decide to have four children, all of whom end up with beautiful brown
eyes. Assume B=brown eyes and b=blue eyes.
19. What is the genotype of the brown-eyed wife?
A) b
B) bb
C) BB
D) B
20. What genotype do of all the children have to be?
A) Bb
B) bb
C) BB
D) B
21. What are the genotypes of the man’s parents?
A) BB, Bb
B) Bb, Bb
C) bb, bb
D) BB, BB
22. Which of these would produce the same phenotype while having different genotypes?
A) BB, BB
B) Bb, bb
C) b, Bb
D) Bb, BB
23. ___ describes how likely it is that a certain event will happen.
A) Ratio
B) Product
C) Probability
D) Integer
24. What is a mutation?
a) Any change that is harmful to an organism
b) Any change in a gene or chromosome
c) Any change that is helpful to an organism
d) Any change in the phenotype of a cell
25. A pedigree is
A) a chart that tracks which members of a family have a particular trait
B) a geneticist who studies the inheritance of traits in humans
C) a picture of all of the chromosomes in a cell
D) an allele passed from parent to child on a sex chromosome
26. If a human body cell has 46 chromosomes, how many chromosomes do the sex cells have?
A) 12
B) 23
C) 46
D) 6
27. An allele whose trait always shows up in an organism when the allele is present is called a
A) mutation
B) dominate allele
C) bossy allele
D) recessive allele
28. For codominant traits, heterozygous organisms have a phenotype that shows
A) both alleles
B) only the recessive allele
C) neither the dominant or recessive allele
D) only the dominant allele
29. Sex-linked genes are genes on
A) the X chromosome only.
C) the X and Y chromosomes.
B) the Y chromosome only.
D) all 23 pairs of chromosomes.
30. A carrier is a person who
a) can pass on the trait without showing it
b) never passes on the trait
c) has the trait
d) always passes on the trait
31. The process by which the number of chromosomes is reduced by half to form sex cells is __.
a. Circulation
b. Mitosis
c. Differentiation
d. Meiosis
32. The factors, or units of heredity, that produce traits are
A) jeans
B) genes
C) mutations
D) ribosomes
33. Cloning results in two organisms that are
A) both adult mammals.
B) produced from cuttings.
C) genetically similar.
D) genetically identical.
34. In the diagram, what three-letter code tells that the protein is complete?
A) AUG
B) UGA
C) TAC
35. What process is shown in the diagram?
A) meiosis
B) DNA replications
C) protein synthesis
36. Which strand of the DNA molecule was used to make the messenger RNA?
A) A strand
B) B strand
C) neither A strand nor B strand
Tell me whether the statement is True (A) or False (B).
37. ________Unlike DNA, RNA contains the nitrogen base Uracil.
38. _______ A male is represented by a square in a pedigree.
39. _______ When base pairs are matching on a strand of DNA Guanine will match with Thymine.
40. _______ Mutations can be helpful.
Genetics Test Form-B
Tell me whether the statement is True (A) or False (B).
1. ________Unlike DNA, RNA contains the nitrogen base Uracil.
2. _______ A male is represented by a square in a pedigree.
3. _______ When base pairs are matching on a strand of DNA Guanine will match with Thymine.
4. _______ Mutations can be helpful.
Multiple Choice: Identify the choice that best completes the statement or answers the question.
Use the Punnett Square to answer the following questions
H
h
H
HH
Hh
h
Hh
hh
H= short hair
h = long hair
5. What is the genotype of the heterozygous offspring?
A) Hh
B) hh
c) HH
D) none of these
6. What is the probability for an offspring to have short hair?
A) 3/4
B) 2/4
c) 1/4
D) 4/4
7. What will the phenotype be of the offspring with the genotype hh?
A) short hair
B) medium hair
c) long hair
D) cannot be determined
8. A black guinea pig has a genotype of BB and a white guinea pig has a genotype of bb. If black is
the dominate gene and we crossed these two guinea pigs, what percent of their offspring will
have black fur?
A) 25%
B) 50%
c) 75%
D) 100%
9. A male mouse (Bb) is bred with a female mouse (bb). The dominate gene is black and the
recessive gene is brown. Which Punnett Square shows the correct genotype for the offspring of
the mice?
A)
Bb
Bb
Bb
Bb
B)
10. Sex-linked genes are genes on
A) the X chromosome only.
C) the X and Y chromosomes.
Bb
Bb
Bb
Bb
C)
Bb
Bb
bb
bb
B) the Y chromosome only.
D) all 23 pairs of chromosomes.
11. Scientists call an organism that has two different alleles for a trait a
A) hybrid
B) trait
C) purebred
D) factor
12. An organism’s physical appearance is its
A) genotype
B) phenotype
C) codominance
D) heterozygous
The following chart is a pedigree that shows how a dominant trait, X-ray vision is
inherited within a family.
13. How many males in the first generation have x-ray vision?
A) 3
B) 2
C) 1
D) 0
14. What is the genotype of the third generation female?
A) ee
B) Ee
C) EE
D) cannot be determined
15. How many marriage/mating are represented on this family pedigree?
A) 2
B) 4
C) 6
D) 8
16. What is the genotype of the third generation male?
A) Ee
B) EE
C) ee
D) EeE
17. Gregor Mendel crossed a yellow pea plant with a green pea plant. The offspring of these plants
were all green. Which statement best describes how this occurred?
A) yellow is dominant
B) green is recessive
C) green and yellow blend
D) green is dominant
18. Which of the following are listed from largest to smallest?
A) DNA-gene-cell- chromosomes-nucleus
B) cell-nucleus-chromosomes-DNA-nitrogen bases
C) nucleus-cell-chromosome-gene-DNA
D) cell-nucleus-gene-nitrogen bases-chromosomes
19. In which type of reproduction are 2 parents necessary?
A) asexual
B) disexual
C) monosexual
D) sexual
20. Which process produces sex cells?
A) Mytoeses
B) Miboates
D) Meiosis
C) Mitosis
21. The passing of traits from parents to offspring is called __.
A) codominance
B) incomplete dominance
C) inheritance
22. An organism that has two identical alleles for a trait is
A) codominant
B) tall
C) homozygous
D) heterozygous
A blue-eyed man, who has two brown-eyed parents, gets married to a brown-eyed woman. The
man and the woman decide to have four children, all of whom end up with beautiful brown
eyes. Assume B=brown eyes and b=blue eyes.
23. What is the genotype of the brown-eyed wife?
A) b
B) bb
C) BB
D) B
24. What genotype do of all the children have to be?
A) Bb
B) bb
C) BB
D) B
25. What are the genotypes of the man’s parents?
A) BB, Bb
B) Bb, Bb
C) bb, bb
D) BB, BB
26. Which of these would produce the same phenotype while having different genotypes?
A) BB, BB
B) Bb, bb
C) b, Bb
D) Bb, BB
27. ___ describes how likely it is that a certain event will happen.
A) Ratio
B) Product
C) Probability
D) Integer
28. What is a mutation?
a) Any change that is harmful to an organism
b) Any change in a gene or chromosome
c) Any change that is helpful to an organism
d) Any change in the phenotype of a cell
29. A pedigree is
A) a chart that tracks which members of a family have a particular trait
B) a geneticist who studies the inheritance of traits in humans
C) a picture of all of the chromosomes in a cell
D) an allele passed from parent to child on a sex chromosome
30. If a human body cell has 46 chromosomes, how many chromosomes do the sex cells have?
A) 12
B) 23
C) 46
D) 6
31. An allele whose trait always shows up in an organism when the allele is present is called a
A) mutation
B) dominate allele
C) bossy allele
D) recessive allele
32. For codominant traits, heterozygous organisms have a phenotype that shows
A) both alleles
B) only the recessive allele
C) neither the dominant or recessive allele
D) only the dominant allele
33. Is it possible for a son to inherit an allele on an X chromosome from his father?
A) Yes because you receive one chromosome from each parent
B) No because males are YY
C) Yes because males are XX
D) No because males only have one X chromosome that comes from their mother.
34. A carrier is a person who
a) can pass on the trait without showing it
b) never passes on the trait
c) has the trait
d) always passes on the trait
35. The process by which the number of chromosomes is reduced by half to form sex cells is __.
a. Circulation
b. Mitosis
c. Differentiation
d. Meiosis
36. The factors, or units of heredity, that produce traits are
A) jeans
B) genes
C) mutations
D) ribosomes
37. Cloning results in two organisms that are
A) both adult mammals.
B) produced from cuttings.
C) genetically similar.
D) genetically identical.
38. In the diagram, what three-letter code tells that the protein is complete?
A) AUG
B) UGA
C) TAC
39. What process is shown in the diagram?
A) meiosis
B) DNA replications
C) protein synthesis
40. Which strand of the DNA molecule was used to make the messenger RNA?
A) A strand
B) B strand
C) neither A strand nor B strand