EBK PRINCIPLES OF BIOLOGY
EBK PRINCIPLES OF BIOLOGY
2nd Edition
ISBN: 8220103675338
Author: BROOKER
Publisher: YUZU
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Chapter 28.4, Problem 1CC
Summary Introduction

To write:

The consequences if the leaves were radially symmetric

Introduction:

Phyllotaxy is the arrangement of leaves in plant stem. The leaves are arranged in the specific pattern and not haphazard. The leaves are spread about the stem having short or long internodes between them. Sometimes, leaves arise as a cluster. In this type of arrangement, two, three leaves arise at each node. In case there is one leaf, it is usually spiral, alternate, or cyclic. In case there are more than three leaves, the arrangement is often cyclic.

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Alleles at the P locus control seed color. Plants which are pp have white seeds, white flowers and no pigment in vegetative parts. Plants which are P_ have black seeds, purple flowers and may have varying degrees of pigment on stems and leaves. Seed color can be assessed, visually, based on if the seed is white or not white A gene for mold resistance has been reported and we want to determine its inheritance and whether it is linked to P. For the purposes of this exercise, we will assume that resistance is controlled by a single locus M, and M_ plants are resistant and mm plants are susceptible.  Resistance can be measured, under greenhouse conditions, 2 weeks after planting, by injecting each seedling with a spore suspension. After two weeks, the seedlings can be rated as resistant or susceptible, based on whether or not tissue is actively sporulating. For this exercise we will use seed and data from the F10 generation of a recombinant inbred population produced using single seed…
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