True/False
Indicate whether the sentence or statement is true
or false.
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1.
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Men
and women have a different number of chromosomes.
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2.
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You
can tell the difference between men and women just by looking at a photograph of their
chromosomes.
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3.
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Men
and women have entirely different kinds of chromosomes.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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4.
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If
you cross two rabbits that have the genotype Bb, how many possible genotypes can be
found in the offspring?
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5.
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In
meiosis, a. | the chromosomes
are copied twice. | b. | the nucleus divides once. | c. | four cells are
produced from a single cell. | d. | All of the above | | |
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Study
the diagram of the stages of meiosis and answer the questions that follow.
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6.
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What
occurs at stage 2 of meiosis? a. | Pairs of homologous chromosomes line up at the cell's
equator. | b. | The chromosomes separate from their homologous partners and
move to opposite poles of the cell. | c. | The nuclear membrane re-forms, and the cell divides, the paired
chromatids remain joined. | d. | Each chromosome makes an identical copy of itself, forming
chromatids. | | |
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7.
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What
occurs at stage 5 of meiosis? a. | The chromosomes line up at the equator of each
cell. | b. | Each cell contains one member of each homologous chromosome
pair. The chromosomes are not copied again. | c. | The nuclear
membrane forms around the separated chromosomes, and the cells divide. | d. | The chromatids
pull apart and move to opposite ends of the cell. | | |
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8.
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What
occurs at stage 6 of meiosis? a. | The chromosomes line up at the equator of each
cell. | b. | Each cell contains one member of each homologous chromosome
pair. The chromosomes are not copied again. | c. | The nuclear
membrane forms around the separated chromosomes, and the cells divide. | d. | The chromatids
pull apart and move to opposite ends of the cell. | | |
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9.
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What
occurs at stage 7 of meiosis? a. | The chromosomes line up at the equator of each
cell. | b. | Each cell contains one member of each homologous chromosome
pair. The chromosomes are not copied again. | c. | The nuclear
membrane forms around the separated chromosomes, and the cells divide. | d. | The chromatids
pull apart and move to opposite ends of the cell. | | |
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10.
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What
occurs at stage 3 of meiosis? a. | Pairs of homologous chromosomes line up at the cell's
equator. | b. | The chromosomes separate from their homologous partners and
move to opposite poles of the cell. | c. | The nuclear membrane re-forms, and the cell divides, the paired
chromatids remain joined. | d. | Each chromosome makes an identical copy of itself, forming
chromatids. | | |
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11.
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What
occurs at stage 8 of meiosis? a. | The chromosomes line up at the equator of each
cell. | b. | Each cell contains one member of each homologous chromosome
pair. The chromosomes are not copied again. | c. | The nuclear
membrane forms around the separated chromosomes, and the cells divide. | d. | The chromatids
pull apart and move to opposite ends of the cell. | | |
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12.
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What
occurs at stage 1 of meiosis? a. | Pairs of homologous chromosomes line up at the cell's
equator. | b. | The chromosomes separate from their homologous partners and
move to opposite poles of the cell. | c. | The nuclear membrane re-forms, and the cell divides, the paired
chromatids remain joined. | d. | Each chromosome makes an identical copy of itself, forming
chromatids. | | |
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13.
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What
occurs at stage 4 of meiosis? a. | Pairs of homologous chromosomes line up at the cell's
equator. | b. | The chromosomes separate from their homologous partners and
move to opposite poles of the cell. | c. | The nuclear membrane re-forms, and the cell divides, the paired
chromatids remain joined. | d. | Each chromosome makes an identical copy of itself, forming
chromatids. | | |
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14.
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Two
forms of the same gene are known as a. | alleles. | c. | genotypes. | b. | chromosomes. | d. | sex
cells. | | | | |
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15.
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If
you cross a white flower (with the genotype pp) with a purple flower (with the genotype
PP), the possible genotypes of the offspring are a. | PP
and pp. | c. | all
PP. | b. | all Pp. | d. | all pp. | | | | |
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Use
the Punnett square below to answer the questions that follow.
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16.
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In
the Punnett square above, 1 represents the phenotype a. | wrinkled, yellow
seeds. | c. | round, yellow
seeds. | b. | wrinkled, green seeds. | d. | round, green seeds. | | | | |
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17.
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In
the Punnett square above, X represents the phenotype a. | wrinkled, yellow
seeds. | c. | round, yellow
seeds. | b. | wrinkled, green seeds. | d. | round, green seeds. | | | | |
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18.
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In
the Punnett square above, 2 represents the genotype a. | RRYY. | c. | RrYy. | b. | RrYY. | d. | rrYy. | | | | |
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19.
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In
the Punnett square above, 5 represents the phenotype a. | wrinkled, yellow
seeds. | c. | round, yellow
seeds. | b. | wrinkled, green seeds. | d. | round, green seeds. | | | | |
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20.
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In
the Punnett square above, the alleles for a true-breeding yellow plant are written
as
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21.
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In
the Punnett square above, the alleles for a true-breeding green plant are written as
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Below
is an illustration of a self-pollinating flower. Study the illustration and answer the questions that
follow.
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22.
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Pollen is produced in the a. | stigma. | c. | petal. | b. | anther. | d. | ovule. | | | | |
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23.
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In
asexually reproducting eukaryotes, the parent cell divides a. | after the
chromosomes are copied through mitosis. | b. | before the chromosomes are copied through
mitosis. | c. | after the chromosomes are copied through
meiosis. | d. | before the chromosomes are copied through
meiosis. | | |
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Mendel's experiments resulted in 705 plants with purple flowers and 224 plants with
white flowers.
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24.
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Which
of the following calculates the ratio of purple flowers to white flowers?
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25.
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Which
of the following calculates the ratio of the white-flowered plants to all the offspring obtained from
this experiment?
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26.
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Which
of the following calculates the ratio of the purple-flowered plants to all the offspring obtained
from this experiment?
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27.
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A
genetic cross resulted in 5,474 plants with round seeds and 1,850 plants with wrinkled seeds. Which
of the following calculates the ratio of round seeds to wrinkled seeds?
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28.
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If a
purple flower with the genotype Pp (P = purple; p = white)
self-pollinates, the ratio of purple offspring to white offspring would be a. | three purple:one
white. | c. | one purple:three
white. | b. | two purple:two white. | d. | four purple:zero white. | | | | |
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29.
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If
two first-generation self-pollinating plants are crossed, Pp ´
Pp, what is the probability that offspring plants will show the dominant
trait?
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30.
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When
a true-breeding plant self-pollinates, a. | it will always produce offspring with the same traits the
parent plant has. | b. | it will never produce offspring with the same traits the parent
plant has. | c. | it will only occasionally produce offspring with the same
traits the parent plant has. | d. | the daughter plant is a mutation of the parent
plant. | | |
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31.
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A
self-pollinating plant has a. | anthers. | c. | both anthers and a stigma. | b. | a
stigma. | d. | neither anthers
nor a stigma. | | | | |
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32.
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A
genetic cross resulted in 6,002 plants with yellow seeds and 2,001 plants with green seeds. Which of
the following calculates the ratio of yellow seeds to green seeds?
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33.
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For
the above cross, what would the phenotypes be? a. | all white | c. | all purple | b. | all
tall | d. | 1/2 white, 1/2
purple | | | | |
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34.
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Bacteria reproduce through an asexual process called a. | mitosis. | c. | meiosis. | b. | cytokinesis. | d. | binary fission. | | | | |
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35.
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A
genetic cross results in 882 plants with smooth pods and 299 plants with bumpy pods. Which of the
following calculates the ratio of smooth pods to bumpy pods?
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