LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 9781319145125
Author: Sadava
Publisher: MAC HIGHER
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Chapter 48.1, Problem 1R
Summary Introduction
To review:
The partial pressure of the oxygen in the air that is inhaled, at sea level, at 10 m underwater, and at 2,000 m above the sea level (atmospheric pressure is 80% that of the sea level).
Introduction:
The partial pressure of the gas is defined as the part of the volume occupied by that particular gas in the mixture of the gases. In the atmosphere, the oxygen occupies 21% of the total gases present in the atmosphere.
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*Example 2: Tracing the path of an autosomal dominant trait
Trait: Neurofibromatosis
Forms of the trait:
The dominant form is neurofibromatosis, caused by the production of an abnormal form of the protein
neurofibromin. Affected individuals show spots of abnormal skin pigmentation and non-cancerous
tumors that can interfere with the nervous system and cause blindness. Some tumors can convert to a
cancerous form. i
The recessive form is a normal protein - in other words, no neurofibromatosis.moovi
A typical pedigree for a family that carries neurofibromatosis is shown below. Note that carriers are not
indicated with half-colored shapes in this chart. Use the letter "N" to indicate the dominant neurofibromatosis
allele, and the letter "n" for the normal allele.
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Chapter 48 Solutions
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