Explain the rnechanism of sex determination in insects like Drosophila and grasshopper.

Explanation

### Step-by-Step Solution:

**Step 1: Understanding Sex Determination in Drosophila**
- In Drosophila (fruit flies), the mechanism of sex determination follows the XX/XY system, similar to humans. However, the key difference is that the Y chromosome does not play a role in determining maleness.
- Instead, sex determination is based on the ratio of X chromosomes to the number of autosomes (non-sex chromosomes).

**Step 2: The X to Autosome Ratio**
- The sex of Drosophila is determined by the X to autosome (A) ratio:
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