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Description: Suppose you have a line of mice that has cytologicallydistinct forms of chromosome 4. The tip of the chromosome can have a knob (called 4K) or a satellite (4S) orneither (4). Here are sketches of the three types:4K4S4You cross a 4K/4S female with a 4

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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Suppose you have a line of mice that has cytologically
distinct forms of chromosome 4. The tip of the chromosome can have a knob (called 4K) or a satellite (4S) or
neither (4). Here are sketches of the three types:
4K
4S
4
You cross a 4K/4S female with a 4/4 male and find that
most of the progeny are 4K/4 or 4S/4, as expected.
However, you occasionally find some rare types as
follows (all other chromosomes are normal):
a. 4K/4K/4
b. 4K/4S/4
c. 4K
Explain the rare types that you have found. Give, as
precisely as possible, the stages at which they originate,
and state whether they originate in the male parent,
the female parent, or the zygote. (Give brief reasons.)

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