Sex limited and sex linked genes are located in

Options

A. Autosomes
B. X-chromosome
C. Y-chromosome
D. Both A and B

Answer

To solve the question "Sex limited and sex linked genes are located in," we will analyze the definitions and locations of these types of genes step by step.

### Step-by-Step Solution:

1. **Understanding Sex-Limited Genes**:
- Sex-limited genes are those that are present in both males and females but are expressed in only one sex. For example, certain traits like milk production in cows are controlled by genes that are present in both genders but only expressed in females.

2. **Understanding Sex-Linked Genes**:
- Sex-linked genes are located on the sex chromosomes, primarily the X and Y chromosomes. These genes can influence traits that are expressed differently in males and females due to their location on these chromosomes. For instance, color blindness is a trait linked to the X chromosome.

3. **Identifying Locations**:
- Sex-limited genes can be found on autosomes (non-sex chromosomes) and can also be influenced by the sex chromosomes.
- Sex-linked genes are specifically found on the X and Y chromosomes.

4. **Analyzing the Options**:
- **Option A: Autosomes** - Correct, as sex-limited genes can be located here.
- **Option B: X-chromosomes** - Correct, as sex-linked genes are located here.
- **Option C: Y-chromosomes** - Incorrect, as not all sex-linked genes are located here, and many are on the X chromosome.
- **Option D: Both A and B** - This is the most comprehensive answer as it includes both autosomes and X-chromosomes where these genes can be found.

5. **Final Answer**:
- The correct answer is **both A and B**.