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Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Directed Reading 14.3
Section: Genome Interactions
Read each question, and write your answer in the space provided.
1. What is a genome?
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2. What is meant by the “universal code?”
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In the space provided, write the letter of the description that best matches each
term.
_____ 3. plasmid
_____ 4. transposon
_____ 5. noncoding
DNA
a. introns are examples
b. jumping gene
c. extra piece of DNA found in bacteria
d. plasmids are examples
_____ 6. MGE
Complete each statement by underlining the correct term in the brackets.
7. In cell differentiation, cells become [transposed / specialized].
8. Regulatory genes that control development include [homeotic genes /
telomeres].
In the space provided, explain how the terms in each pair differ in meaning.
9. CDK, cyclin
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Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
5
Genes in Action
Name ______________________________ Class ___________________ Date __________________
10. apoptosis, cell differentiation
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11. Which of the following can add new genes to a eukaryotic genome?
a. transposons
c. plasmids
b. homeotic genes
d. retroviruses
12. What is the evidence that mitochondria and chloroplasts emerged from an
endosymbiotic relationship? _______________________________________
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13. Describe the function of hox genes. _________________________________
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Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
6
Genes in Action