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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Certain mutations in common wall cress (Arabidopsis thaliana) cause excess auxin production. Predict the impact of these mutations on a plant's phenotype.

Summary Introduction

To explain: The impact on the phenotype of common wall cress (Arabidopsis thaliana) as a result of a mutation that causes excess auxin production.

Concept introduction: Mutation is a permanent variation of some nucleotide sequences in the genome of an organism that may result in deviation from normal phenotypic features. Each and every character of a plant is encoded by specific genes. Phytohormones produced by the plants can also undergo mutations in the nucleotide sequences of the respective genes. Such deviations in the normal nucleotide constitution always affect the normal features and functions of the hormones.

Explanation
Auxin is one of the major plant hormones that do many cardinal functions inside the plant body. There are genes that specifically encode for the production of auxins. If any mutation occurs in the nucleotide sequence of that gene, it would produce auxin in enormous amount which would result in hyperactivation of auxin hormone...

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