Essentials of Human Anatomy & Physiology
Essentials of Human Anatomy & Physiology
11th Edition
ISBN: 9780133481662
Author: Elaine N. Marieb
Publisher: PEARSON
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Chapter 13, Problem 13SAE
Summary Introduction

To review:

The importance of pharyngotympanic tubes and sinuses being drained into nasal cavity and nasopharynx to be explained.

Introduction:

Pharyngotympanic tubes mainly open into the nasopharynx and they further drain into the middle ear. Sinuses, on the other hand, drain into the nasal cavity. Nasopharynx and nasal cavity help in removal of mucosal entrapments from the pharyngotympanic tubes and nasopharynx.

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Question #3: In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming there was just one gene conferring gametophytic obligate apomixis, and that the two parents are inbreds, what would be the consequences of such a cross if: a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the parental cross. b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the…
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