Traits controlled by genes present on X chromosome are called

Options

A. Sex limited
B. Sex influenced
C. Autosomal
D. Sex linked

Answer

To answer the question, "Traits controlled by genes present on X chromosome are called," we can follow these steps:

### Step 1: Understand the Chromosomal Basis of Inheritance
- The X and Y chromosomes are known as sex chromosomes, which play a crucial role in determining the sex of an individual and also carry genes that influence various traits.

### Step 2: Identify the Types of Traits
- Traits can be categorized based on their inheritance patterns. Some traits are influenced by genes located on the sex chromosomes (X and Y), while others are influenced by genes located on the autosomes (non-sex chromosomes).

### Step 3: Define the Relevant Terms
- **Sex-linked traits**: These are traits that are controlled by genes located on the sex chromosomes, specifically the X chromosome in this context.
- **Sex-limited traits**: These traits are expressed only in one sex, but the genes are not necessarily located on the sex chromosomes.
- **Sex-influenced traits**: These traits can be expressed in both sexes but are influenced by the sex of the individual.
- **Autosomal traits**: These traits are controlled by genes located on the autosomes, which are the chromosomes that are not involved in determining sex.

### Step 4: Analyze the Options
- The question provides four options: sex limited, sex influence, autosomal, or sex linked.
- Since we are specifically looking for traits controlled by genes on the X chromosome, the correct term is **sex linked**.

### Step 5: Conclusion
- Therefore, the traits controlled by genes present on the X chromosome are called **sex linked traits**.

### Final Answer
**Sex linked**

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