Biology: Life on Earth with Physiology (11th Edition)
Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 11.4, Problem 1TC
Summary Introduction

To explain:

Whether a genotype of a plant bearing smooth, yellow seeds be revealed by a test cross with a plant bearing wrinkled green seeds.

Introduction:

Test cross includes the cross of heterozygous progeny with the recessive homozygous parent leading to the formation of progeny.

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A purple flowering, smooth seed dihybrid plant (genotype PpSs) is test crossed with a white flowering, wrinkled seed plant (genotype ppss). These produce progeny in the following numbers of four phenotypes: 24:76:74:26 (purple flower + smooth seed coat: purple flower + wrinkled seed coat: white flower + smooth seed coat: white flower + wrinkled seed coat).   a) What is the genotype of the original dihybrid plant? Specify which alleles are on each chromosome of the purple flowering, smooth seed plant (i.e. AB/ab or Ab/aB).   b) How many map units separate the colour and seed coat genes? Show your calculations.
If an incompletely dominant red-flowered plant is crossed with an incompletely dominant white-flowered plant, what are the genotypes and phenotypes of the plant F1 generation? What genotypes and phenotypes will be produced in the F2 generation?
A) In these plants, green leaf color is dominant to yellow leaf color. You are given a plant with green leaves and are asked to determine its genotype.  What type of cross will you perform?  B) The results of this cross are: 50% green leaf plants and 50% yellow leaf plants.  What is the genotype of the green leaf plant you were given?

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Biology: Life on Earth with Physiology (11th Edition)

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