Question

The observable traits expressed by an organism are described as its ________. a. phenotype b. genotype c. alleles d. zygote

Short answer

Option a is correct.

Step-by-step solution

Step 1. Introduction

Specific characteristics of an organism are known as traits. These traits can be determined by the gene, environment, or by both gene and environment.

Step 2. Explanation of the correct option

Option a is correct because the phenotype refers to the physical appearance for the specific feature.

Step 3. Explanation of the incorrect option

Option b is incorrect because genortype is a gentic constitution of any particular traits.

Option c is incorrect because allels refers to the alternative forms of the gene.

Option d is incorrect because zygote is a fertilized egg result form the fertilization of ova and sperms.