Biological Science
5th Edition
ISBN: 9780321743671
Author: Scott Freeman
Publisher: PEARSON
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Chapter 24, Problem 16TYPSS
Summary Introduction
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The rate of mutation in gene of a germ-line cell in the oak tree egg relative to the gene of a germ-line cell in the mouse egg.
Introduction:
The germ-line cells are own cells of an organism that participate in the reproduction processes and pass the genetic information to the progeny. The mouse germ-line cells show only
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In recent years, techniques have been developed to clone mammals through a process called nuclear transfer, in which the nucleus of a somatic cell is transferred to an egg cell from which the nuclear material has been removed . Research has demonstrated that when a nucleus from a differentiated somatic cell is transferred to an eggcell, only a small percentage of the resulting embryos complete development, and many of those that do die shortly after birth. In contrast, when a nucleus from an undifferentiated embryonic stem cell is transferred to an egg cell, the percentage of embryos that complete development is significantly higher (W. M. Rideout, K. Eggan, and R. Jaenisch. 2001. Science 293:1095–1098). Propose a possible reason for why a higher percentage of cloned embryos develop successfully when the nucleus transferred comes from an undifferentiated embryonic stem cell.
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