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CHAPTER 10.1
Sexual Reproduction and Genetics
Part A: Multiple Choice
In the space at the left, write the letter of the term, number, or phrase that best answers
each question.
1. How many chromosomes are found in human body cells?
A. 11
B. 23
C. 46
D. 92
2. Which describes a gene?
A. chromosome pair
B. chromosome trait
C. DNA segment
D. haploid cell
3. How is an allele described?
A. form of a gene
B. one haploid cell
C. part of a chromosome
D. short segment of DNA
________ 4. What is formed as a result of mitosis?
A. four genetically different cells
B. four genetically identical cells
C. two genetically different cells
D. two genetically identical cells
________ 5. The process by which haploid gametes combine is called _________________.
A. interphase
B. fertilization
C. genetic variation
D. synapsis
_________ 6. Crossing over results in ________________.
A.
B.
C.
D.
the removal of genetorypes from a zygote
less genetic variation
fewer combinations of genes
the greater genetic variation
_________ 7. Diploids contain twice the number of chromosomes found in a single _____________.
A. gamete
B. zygote
C. protein molecule
D. synapse
_________ 8. Homologous chromosomes separate during which phase(s) of meiosis?
A.
B.
C.
D.
Interphase
Anaphase I
Telophase I
Interphase and telophase I
_________ 9. Meiosis produces ___________ in gametes.
A. Enzymes
B. Identical daughter cells
C. 46 chromosomes
D. Genetic variation
Part B: Matching
For each statement, check the box indicating whether the statement applies to mitosis or
meiosis. Check only one box for each statement.
Statement
Mitosis
10.
Two sets of cell divisions occur.
11.
The DNA of the resulting daughter cells are identical.
12.
Gametes are formed.
13.
Cell growth and repair is completed.
14.
Potential evolutionary changes can occur more frequently.
Meiosis
Completion Write the correct term in the blank to complete each sentence below. WORK BANK:
23
46
ASEXUAL REPRODUCTION
FATHER
GENE
GAMETES
HAPLOID
HEREDITY OR INHERITANCE
MOTHER
SEX CELLS
15. The number of chromosomes in a human body cell equals
16.A segment of DNA is called a(n)
.
.
17.An Escherichia coli bacterium daughter cell inherits the exact DNA from its parent cell during the process
of
.
18.The passing of fur color from a parent dog to its offspring is an example
of
.
19. Homologous chromosomes come from your _________________ and your ________________.
20. In a haploid cell “n” represents __________________.
21. Haploid cells can be called ___________________ or ___________________.
Part D: Short Answer
Write your response to each statement in the space provided.
22.
Contrast the genetic makeup of offspring from sexual and asexual reproduction.
23.
Define gene.
24. Explain how fertilization causes the cell to go from “n” to 2n.
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