EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 16.3, Problem 1R
Summary Introduction
To review:
The negative and positive gene expression regulation in the life cycles of bacteriophage λ and the HIV (human immune deficiency virus).
Introduction:
An activator binds to a specific site on a DNA (deoxyribonucleic acid) sequence near the promoter or far away from the promoter and initiates transcription. This is positive regulation of the gene transcription. In the case of negative regulation, a repressor protein binds to the promoter and prevents the process of transcription. Bacteriophage λ and HIV show both positive and negative regulation of gene expression.
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Please answer q3
Respond to the following in a minimum of 175 words:
How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients?
What are some potential ethical issues associated with using this technology?
Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.
You are studying the effect of directional selection on body height in three
populations (graphs a, b, and c below).
(a) What is the selection differential? Show your calculation. (2 pts)
(b) Which population has the highest narrow sense heritability for height?
Explain your answer. (2 pts)
(c) If you examined the offspring in the next generation in each population,
which population would have the highest mean height? Why? (2 pts)
(a)
Midoffspring height (average height of offspring)
Short
Short
Short
Short
(c)
Short
(b)
Short
Tall
Short
Tall
Short
Short
Tall
Midparent height
(average height of
Mean of population = 65 inches
Mean of breading parents = 70 inches
Mean of population = 65 inches
Mean of breading parents = 70 inches
Mean of population = 65 inches
Mean of breading parents = 70 inches
Chapter 16 Solutions
EBK LIFE: THE SCIENCE OF BIOLOGY
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