What is Phenotype _ It’s Meaning and Definition The physical appearance or biochemical.

What is Phenotype _ It’s Meaning and Definition The physical appearance or biochemical.



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Phenotype: Meaning and Definition

A phenotype is the observable physical appearance, biochemical characteristics, and behavior of an organism, which result from the interaction of its genetic makeup (genotype) and environmental factors.

Key Characteristics of Phenotype:

  • It includes visible traits like height, eye color, and hair texture.

  • It also involves biochemical and physiological traits like blood type, metabolism, and disease resistance.

  • The same genotype can produce different phenotypes under different environmental conditions (e.g., identical twins may look slightly different due to lifestyle differences).

Examples of Phenotypes:

  1. Physical Traits – Blue eyes, curly hair, tall height

  2. Biochemical Traits – Blood type (A, B, AB, O), lactose intolerance

  3. Behavioral Traits – Aggressiveness, intelligence (partly genetic, partly environmental)

  4. Disease Susceptibility – Genetic disorders like sickle cell anemia

Phenotype vs. Genotype:

Feature Phenotype Genotype
Definition Observable characteristics of an organism Genetic makeup (DNA sequence)
Influenced by Genes + Environment Inherited genes from parents
Example Brown eyes, tall height BB, Bb (for brown eye color)

Would you like an example related to human genetics or a diagram to explain it visually?



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