Location of a particular gene on sex chromosome or autosomes can be identified by -

Options

A. Test cross
B. Out cross
C. Back cross
D. Reciprocal cross

Answer

To determine the location of a particular gene on sex chromosomes or autosomes, we can analyze the options provided and understand their definitions and applications. Here’s the step-by-step solution:

### Step 1: Understand the Options
1. **Test Cross**: This is used to determine whether an individual with a dominant phenotype is homozygous or heterozygous. It involves crossing the individual with a homozygous recessive individual.

2. **Outcross**: This involves breeding between different breeds or varieties. It increases genetic diversity but does not specifically help in identifying the location of a gene.

3. **Back Cross**: This is a cross between a hybrid and one of its parents or an individual genetically similar to its parent. It is mainly used in breeding and does not specifically identify gene location.

4. **Reciprocal Cross**: This is a breeding experiment designed to test the role of parental sex in inheritance. It involves crossing two individuals and then switching the sexes of the parents in the second cross.

### Step 2: Identify the Correct Option
Among the options, the **reciprocal cross** is the most relevant for identifying the location of a gene on sex chromosomes or autosomes. This method allows researchers to observe how the traits are inherited based on the sex of the parents, which can provide insights into whether a gene is located on a sex chromosome or an autosome.

### Conclusion
The location of a particular gene on sex chromosomes or autosomes can be identified by **reciprocal cross**.

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