PRINCIPLES OF LIFE - LAUNCHPAD (1 TERM)
PRINCIPLES OF LIFE - LAUNCHPAD (1 TERM)
3rd Edition
ISBN: 9781319410551
Author: HILLIS
Publisher: MAC HIGHER
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Chapter 15.4, Problem 2TK
Summary Introduction

To determine: The number of cross-species transmissions that are shown in the given phylogeny tree.

Introduction: Cross-species transmission refers to a phenomenon where some viruses jump from single host species into another host and finally infect humans. Bird flu and Swine flu are some of the emerging viruses that show cross-species transmission.

Summary Introduction

To determine: The hosts that are involved in each transmission event.

Introduction: A phylogeny tree indicates the evolutionary relationship between the groups of organisms. The groups of organisms are also referred to as taxa.

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The shape of radishes may be long (SL/SL), oval (SL/SS), or round (SS/SS), and the color of radishes may be red (CR/CR), purple (CR/CW) or white (CW/CW).  If a long, red radish plant is crossed with a round, white plant, what will be the appearance of the F1 and F2 generations?
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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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