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1. In the rainforest, black beetles and green beetles are best able to hide from predators. Those with an
in between color, like grey, are quickly eaten by birds. Over multiple generations, only very dark
and very light beetles survive. What type of selection is described ?
A. Directional Selection
B. Disruptive Selection
C. Artificial Selection
D. Stabilizing Selection
2. Which of the following is an example of stabilizing selection?
A. The birth weight at which newborn humans are most likely to survive and the average weight
of newborn humans are about the same.
B. There is an increase in antibiotic-resistant strains of bacteria.
C. There is an increase in the number of different breeds of dog.
D. Garter snakes with different coloration patterns behave differently when threatened.
3. Evolution of a longer anteater tongue is an example of
A. sexual selection.
B. stabilizing selection.
C. directional selection.
D. disruptive selection.
4. An advantage of sexual reproduction over asexual reproduction is that sexual reproduction
A. produces identical offspring
B. provides genetic diversity
C. takes less time
D. requires more time
5. A Punnett square is used to determine the
A. probable outcome of a cross
B. actual outcome of a cross
C. result of segregation
D. result of meiosis
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6. Both of a child’s parents are heterozygous for unattached earlobe, yet the child has attached earlobes.
Which law of inheritance allows this to be possible?
A. Law of incomplete dominance
B. Law of segregation
C. Law of independent assortment
D. Law of codominance
7. Which of Mendel’s principles tells us that each parent only gives one allele for each trait to their
offspring when alleles are separated into gametes?
A. The Principle of Dominance and Recessiveness
B. The Principle of Segregation
C. The Principle of Independent Assortment
D. The Principle of Cause and Effect
8. MurthySV_What principle states that during gamete formation genes for different traits separate
without influencing each other’s inheritance?
A. principle of dominance
B. principle of independent assortment
C. principle of probabilities
D. principle of segregation
9. What is the term for an allele whose trait is only expressed when other alleles are not present?
A. Recessive
B. Heterozygous
C. Dominant
D. Codominance
10. The expression of a gene in an individual is termed the
A. genotype of the individual
B. incomplete dominance in the individual
C. linked gene
D. phenotype of the individual
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11. Cross a homozygous dominant individual with a heterozygous individual. What is the chance of the
offspring displaying the recessive phenotype?
A. 100%
B. 75%
C. 25%
D. 0%
12. A genotype with 2 of the same alleles is called ___________________.
A. haploid
B. diploid
C. homozygous
D. heterozygous
13. If B is a dominant allele for black fur and b is a recessive allele for white fur. Which answer choice
is an example of a homozygous genotype?
A. BB
B. Bb
C. Black
D. White
14. If B is a dominant allele for black fur and b is a recessive allele for white fur. Which of the
following answer is correct for the genotype of an animal with black fur?
A. BB
B. BB or Bb
C. Bb or bb
D. bb
15. In pea plants, the allele for tall plant height (T) is dominant over the allele for short heigth (t). A
heterozygous plant and a homozygous recessive are crossed. Which of the following would be the
phenotypes of the offspring?
A. all tall plants
B. all short plants
C. two tall plants and two short plants
D. three tall and one short
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16. If a genotype is MM, how would it be described?
A. Hemizygous
B. Heterozygous
C. Homozygous recessive
D. Homozygous dominant
17. What are different forms of the same gene called?
A. alleles
B. recessive
C. homozygous
D. dominant
18. If a pea plant's alleles for height are tt, what is true of its parents?
A. Both parents were tall.
B. Both parents were short.
C. Both parents contributed a recessive allele.
D. Both parents contributed a dominant allele.
19. In a cross of a homozygous dominant male with a homozygous recessive female for a trait that
follows Mendelian principles, what are the genotype and phenotype of the offspring?
A.
heterozygous; dominant
B.
heterozygous; homozygous
C.
dominant; heterozygous
D.
not predictable; dominant
20. Since each child of two heterozygous parents has a 1/4 chance of receiving a recessive trait from
each parent, _______________.
A. If the first child is phenotypically recessive, then the next child must be phenotypically
dominant.
B. If the first child is phenotypically recessive, then the next child has a 3/4 chance of being
phenotypically recessive.
C. If the first child is phenotypically recessive, then the next child has a 1/2 chance of being
phenotypically recessive.
D. No matter what the first child's phenotype, the next child will have a 1/4 chance of being
phenotypically recessive.
