HUMAN BIOLOGY (LOOSELEAF)
HUMAN BIOLOGY (LOOSELEAF)
16th Edition
ISBN: 9781260482690
Author: Mader
Publisher: MCG
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Chapter 16.6, Problem 2CYP
Summary Introduction

To analyze:

Relationship between melatonin and the sleep-wake cycle.

Introduction:

Pineal gland is an endocrine gland and attached to the posterior end of the roof of third ventricle in the brain. In human, it grows in size until the age of 2.Melatonin hormone secreted by Pineal gland in response to the darkness. It is a derivative of tryptophan.

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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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HUMAN BIOLOGY (LOOSELEAF)

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