Campbell Biology In Focus
Campbell Biology In Focus
2nd Edition
ISBN: 9780134203072
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 11, Problem 16TYU

(a)

Summary Introduction

To determine:

(a) All the possible genotype of mystery pea plant. (b) The cross that can be done to determine the exact genotype.(c) The way in which prediction can be done for the possible genotype and why that method is not called performing a cross. (d) The way in which the result of the cross and the prediction will help in determining the genotype of the mystery plant.

Introduction:

Genotype is the genetic makeup of an organism based on single or multiple traits. It helps in deciphering the type of progeny that would be observed in the future generations. The genotype determines the phenotype of the organism and there can be dominant and recessive genes in the genotype. Dominant genes are those genes that are expressed in the heterozygous state and the recessive genes are those that are not expressed in the heterozygous state.

To determine: All the possible genotype of a mystery pea plant.

(b)

Summary Introduction

To determine:

The cross that can be done to determine the exact genotype.

(c)

Summary Introduction

To determine:

The way in which prediction can be done for the possible genotype and why that method is not called “performing a cross”.

(d)

Summary Introduction

To determine:

The way in which the result of the cross and the prediction will help in determining the genotype of the mystery plant.

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Give only typing answer with explanation and conclusion to all parts Two true-breeding varieties of maize, one 11 cm high and the other 47 cm high were crossed and the resultant F1 hybrids were then crossed to generate the F2 . In the F2 there were a total of 13,923 plants with a continuous variation in heights between the two extremes and with only 3 plants as large as 47 cm high and 5 plants of 11 cm high. a) How many i) genes and ii) how many alleles are involved in determining height in this plant? b) What is the contribution of each dominant allele to the phenotype in cm?
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