Answered: . A chicken breeder is working with a…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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. A chicken breeder is working with a population in which
the mean number of eggs laid per hen in one month is 28
and the variance is 5 eggs2. The narrow-sense heritability
is known to be 0.8. Given this information, can the breeder expect that the population will respond to selection
for an increase in the number of eggs per hen in the next
generation?
a. No, applying selection is always risky and a breeder
never knows what to expect.
b. No, a breeder needs to know the broad-sense
heritability to know what to expect.
c. Yes, since the narrow-sense heritability is close to
1 (0.8), then we would expect selective breeding could
lead to increased egg production in the next generation.
d. Yes, since the variance is greater than 0.
e. Both c and d are correct.

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