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Activity
Vocabulary Activity
Vocabulary Garden
After you finish reading the chapter, give this puzzle a try! Write the word or
phrase being described below in the appropriate space on the next page.
1. chromosomes with matching information
2. carry genes that determine the sex of offspring
3. the two genes that govern the same characteristic
4. an organism’s inherited combination of alleles
5. nuclear division in eukaryotic cells in which each cell receives a copy of the
original chromosomes
6. the passing of traits from parents to offspring
7. cell division that produces sex cell
8. kind of trait that seemed to vanish in the offspring produced in Mendel’s first
experiment
9. tool used to visualize all the possible combinations of alleles from parents
10. kind of trait that always appeared in the offspring produced in Mendel’s first
experiment
11. A true-_____ plant always produces offspring with the same trait as the
parent(s).
12. A self-_____ plant contains both male and female reproductive structures.
13. male sex cells
14. an organism’s inherited appearance
15. a tool for tracing a trait through generations of a family
16. the mathematical chance that an event will occur
17. located on chromosomes and carry hereditary instructions
Copyright © by Holt, Rinehart and Winston. All rights reserved.
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71
Heredity
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Vocabulary Activity continued
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Using the numbered letters above, fill in the spaces below to find a phrase related
to heredity.
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Holt Science and Technology
72
Heredity
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TEACHER RESOURCE PAGE
INTERPRETING GRAPHICS
15. Answers will vary. Sample answer:
16.
17.
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20.
Self-pollinating was important because
it allowed Mendel to grow
true-breeding plants. Cross-pollination
was important because he could mix
different traits to check results.
Answers will vary. Sample answer: The
parent cell has 23 pairs of chromosomes making a total of 46. The new
cell has 23 single chromosomes—one
from each pair of parent cells.
Answers will vary. Sample answer: The
chromatids in the seventh set are like
the original chromatids split in half.
B
A
C
1. B
2. H
3. B
MATH
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Vocabulary Activity
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homologous
sex chromosomes
alleles
genotype
mitosis
heredity
meiosis
recessive
Punnett square
dominant
breeding
pollinating
sperm
phenotype
pedigree
probability
genes
Quotation: Gregor Mendel’s Peas
Chapter Test C
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G
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B
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genes
X chromosomes
pedigree
color blindness
D
B
A
SciLinks Activity
Answers will vary. Students should list eye
color and four other inheritable traits,
such as hair color, gender, color blindness,
ear lobe attachment, and dimples, and
provide the requested information for all
five. Answers in the final column should
make sense in terms of the traits listed for
themselves and their parents.
Standardized Test
Preparation
READING
Passage 1
1. C
2. F
3. C
Passage 2
1. A
2. H
3. A
Copyright © by Holt, Rinehart and Winston. All rights reserved.
Holt Science and Technology
96
Heredity