True/False
Indicate whether the
statement is true or false.
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Use the following information to answer true or false to the statement
below.
If a green seed (yy) is crossed with another green seed (yy) what can you predict about
the offspring?
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1.
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(1 point) The phenotype will be green.
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2.
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(1 point) A prediction can not be determined with
just this information.
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3.
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(1 point) The genotype will be small y, small
y. (yy)
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4.
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(1 point) The dominate trait will show.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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5.
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(1 point) A gene:
a. | is a segment of DNA located on chromosomes. | b. | typically contains
one allele from each parent. | c. | determines an organism’s
traits. | d. | All of the above |
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6.
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(1 point) If a recessive trait is expressed in an
organism’s phenotype, what can you determine about its genotype?
a. | At least one allele in the genotype is recessive. | b. | Both alleles in the
genotype are recessive. | c. | Both alleles in the genotype are
dominant. | d. | You cannot determine anything about the organism’s
genotype. |
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7.
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(1 point) If a family has 3 girls and 1 boy what are
the odds that their next child would be a boy?
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8.
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(1 point) A ____ is the form of a gene that, when
present, covers up the appearance of the ____.
a. | recessive gene, dominant gene | b. | recessive allele, dominant
allele | c. | dominant allele, recessive allele | d. | dominant gene, recessive
gene |
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9.
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(1 point) If a pea plant contains a recessive allele
for wrinkled seeds and a dominant allele for smooth seeds, the organism’s phenotype must
be:
a. | half of the seeds are smooth and half are wrinkled. | b. | not really smooth or
wrinkled seeds, a mixture of both traits. | c. | smooth seeds. | d. | wrinkled
seeds. |
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10.
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(1 point) If a recessive trait is expressed in an
organism’s phenotype, what can you determine about its genotype? (Hint: Use a punnett
square to find your answer.)
a. | Both alleles in the genotype are recessive. | b. | Both alleles in the
genotype are dominant. | c. | You cannot determine anything about the
organism’s genotype. | d. | At least one allele in the genotype is
recessive. |
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11.
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(1 point) If a green seed (yy) is crossed with
another green seed (yy) what can you predict about the offspring?
a. | the recessive trait will show | b. | the phenotype will be green | c. | the genotype will be
yy | d. | All of the above |
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12.
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(1 point) A characteristic that an organism can pass
on to its offspring is called a:
a. | trait | b. | phenotype | c. | genotype | d. | gene |
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13.
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(1 point) A(n) ____ is the form of a gene that is
hidden when the dominant allele is present.
a. | recessive allele | b. | allele | c. | dominant
allele | d. | genotype |
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14.
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(1 point) An organisms genotype describes:
a. | the alleles of the gene it contains. | b. | the way it looks. | c. | its physical
characteristics. | d. | the form of a trait it displays. |
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15.
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(1 point) If a true-breeding purple plant is
crossed with a true-breeding white flowered plant, the possible phenotypes of the first
generation of peas are:
a. | all white. | b. | all purple. | c. | 50% purple and 50%
white. | d. | 75% purple and 25% white. |
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16.
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(1 point) Which pair of chromosomes would produce a
male offspring?
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17.
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(1 point) Sex cells have how many alleles for each
gene?
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18.
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(1 point) What happens to alleles during
meiosis?
a. | Alleles are created | b. | Alleles combine | c. | Alleles
separate | d. | Nothing happens |
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19.
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(1 point) If a human with free earlobes (FF), and a
human with attached earlobes (ff) mate. What are the possible phenotypes of the offspring?
a. | The offspring will have free earlobes. | b. | The offspring will either have attached
earlobes or free earlobe. | c. | The offspring will have attached
earlobes. | d. | None of the above |
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20.
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(1 point) If a pea plant contains a recessive allele
for wrinkled seeds and a dominant allele for smooth seeds, the organism’s phenotype must
be:
a. | half of the seeds are smooth and half are wrinkled. | b. | wrinkled
seeds. | c. | smooth seeds. |
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21.
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(1 point)  In the above cross, a round seed pea plant (RR) is crossed with a round seed
pea plant (Rr). What are the possible genotypes for seed shape in the cross?
a. | RR, RR, RR, Rr | c. | Rr, Rr, Rr, Rr | b. | RR, RR, RR, RR | d. | RR, RR, Rr, Rr |
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22.
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(1 point) A cat gets into a fight, and the tips of
both of its ears get torn off. If the cat has kittens later, how will this affect the shapes of
its kittens’ ears?
a. | Some of the kittens’ ears will be missing the tips. | b. | All of the
kittens’ ears will be missing the tips. | c. | All of the kittens’ ears will be slightly
smaller. | d. | It will have no effect on the ears of any of the
kittens. |
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23.
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(1 point) When fertilization occurs, offspring
inherit:
a. | a random amount of chromosomes from each parent. | b. | one homologous
chromosome in a pair from each parent. | c. | two homologous chromosomes in pairs from each
parent. | d. | a complete set of chromosomes from one of the
parents. |
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Short Answer
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24.
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(1 point) Complete the above punnett square.
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25.
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(1 point) In the punnett square, circle the
offspring that has the recessive trait.
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