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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 13, Problem 2SQ
Textbook Problem
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An organism’s observable traits constitute its ______.

  1. a. phenotype
  2. b. variation
  3. c. genotype
  4. d. pedigree

Summary Introduction

Concept introduction: Trait is the variation of the phenotype. Trait is genotypically controlled and is controlled by environmental factors as well.

Explanation of Solution

Reasons for the correct statement:

Phenotypic traits are morphological expression of the genotype and are observable. Genotypic traits require molecular level studies. The morphologically observable characters of the organism such as skin color, hair color, iris color, and many more are called as phenotypic traits.

Option a. is given as “phenotype”

As the phenotypic traits are observable in the organism, option a. is correct.

Reasons for the incorrect statements:

Option b. is given as “variation”.

Variations refer to the general differences among different species and within species as a result of different DNA sequences...

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