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1. If Mendel had chosen more
than seven traits in his plants, he might have run into some confusing results regarding: |
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a. the phenomenon of dominance
b. the Law of Segregation
c. the Law of Independent Assortment
d. all of the above
e. none of the above |
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2. What is the
major value in using a Punnett square? |
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a. shows all
gametic combinations
b. shows genotypic ratios
c. shows phenotypic ratios
d. shows only b and c
e. shows a, b, and c |
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3. A co-dominance
cross between a homozygous red and a homozygous white snapdragons produces: |
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a. plants with 50%
red and 50 % white flowers
b. plants with red flowers
c. plants with pink flowers
d. plants with sterile flowers
e. plants with 75% red and 25% white flowers |
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The next two
questions relate to the following problem: In
Mendel's garden peas, the tall allele (D) is dominant over the dwarf allele (d), and the
green pod allele is dominant (Y) over the yellow pod allele (y). |
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4. Using the
symbols provided above, what is the genotype of a heterozygous tall, homozygous green pod
pea plant? |
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a. DdYy
b. DDYY
c. DdYY
d. DDYy
e. ddYy |
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5. Using the
symbols provided above, what is the genotype of a heterozygous tall, heterozygous green
pod pea plant? |
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a. DDYY
b. DdYy
c. DdYY
d. DDYy
e. ddYy |
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6. A recessive gene
can be expressed if the genotype is: |
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a. homozygous
recessive
b. homozygous dominant
c. heterozygous
d. b and c
e. a and c |
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7. A chestnut
colored horse crossed with a white colored horse results in a palomino coat color. This is
an example of ________ inheritance. |
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a. dominant
b. recessive
c. codominant
d. corecessive
e. none of the above |
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8. Why was Mendel
fairly certain that he had a pure-bred variety when he collected seeds from a pea plant? |
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a. the flower is
self-pollinating in these plants
b. peas bear a large number of "offspring"
c. because the varieties are so distinctive
d. he maintained extremely accurate records
e. he knew that science was a field where mistakes could not be made |
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9. If an organism
with the genotype Ww is crossed with a Ww organism, what would be the proportion of
offspring that would be heterozygous? |
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a. 1/4
b. 1/2
c. 3/4
d. all would be heterozygous
e. none of the offspring |
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10. Phenotype is: |
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a. the genetic make-up of an
individual
b. the same for parent and offspring
c. not observable
d. the appearance of an individual
e. none of the above |
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11. If genes are not linked a
genotype of PpRr can produce ________ different kinds of gametes. |
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a. 1
b. 2
c. 3
d. 4
e. 5 |
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12. In humans, brown eyes (B) is
dominant to blue eyes (b). A brown eyed man marries a blue eyed woman. The possible eye
colors of their children are: |
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a. all brown
b. all blue
c. half brown
d. 3/4 brown, 1/4 blue
e. not enough information is given |
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13. Mendel was the first
biologist to: |
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a. study the mechanics of
inheritance
b. discover that chromosomes are responsible for inheritance
c. use statistical methods in analyzing his results
d. all of the above
e. none of the above |
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14. Mendel's Law of
Segregation states that: |
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a. two factors for
the same trait separate in the production of gametes
b. two different traits will be inherited independently of each other
c. gametes are produced by meiosis
d. all of the above
e. none of the above |
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15. If an
individual has a recessive phenotype for a given trait, the genotype must be: |
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a. heterozygous
b. homozygous recessive
c. homozygous dominant
d. either homozygous recessive of heterozygous
e. determined by performing a test cross |
