When a gene pair in an organism contains two indentical alleles,the organism is condered to be:

Options

A. Phenotypic
B. Genotypic
C. Homozygous
D. Heterozygous

Answer

To solve the question, "When a gene pair in an organism contains two identical alleles, the organism is considered to be:", we can follow these steps:

### Step 1: Understand the Terminology
- **Alleles**: These are different forms of a gene. For any given gene, an organism can have two alleles, one inherited from each parent.
- **Identical Alleles**: When both alleles in a gene pair are the same, they are referred to as identical alleles.

### Step 2: Identify the Types of Allelic Combinations
- **Homozygous**: This term is used when both alleles in a gene pair are identical (either both dominant or both recessive).
- **Heterozygous**: This term is used when the two alleles in a gene pair are different (one dominant and one recessive).

### Step 3: Analyze the Options Given
- **A. Phenotypic**: Refers to the observable characteristics of an organism, not the genetic makeup.
- **B. Genotypic**: Refers to the genetic makeup of an organism, but does not specify whether the alleles are identical or different.
- **C. Homozygous**: Correct term for an organism with two identical alleles.
- **D. Heterozygous**: Refers to having two different alleles.

### Step 4: Conclusion
Since the question specifically states that the organism has two identical alleles, the correct answer is **C. Homozygous**.

### Final Answer
When a gene pair in an organism contains two identical alleles, the organism is considered to be **C. Homozygous**.

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