EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 27.3, Problem 3R
Summary Introduction
To review:
The selective advantage of heterospory over homospory.
Introduction:
The sporophyte of vascular plants produces spores, which develop into male and female reproductive parts. In the oldest lineages of vascular plants, the sporophyte produced only one type of spores, which developed into a single gametophyte having both male as well as female parts. This is known as homospory.
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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
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