Differentiate between 'ZZ' and 'XY' type of sex-determination mechanism.

Explanation

### Step-by-Step Solution:

1. **Definition of Sex Determination Mechanisms**:
- Sex determination mechanisms are biological systems that determine the sex of an organism based on its genetic makeup.

2. **XY Type of Sex Determination**:
- In the XY sex-determination system, which is commonly found in humans and many other mammals, males are heterogametic (XY) and females are homogametic (XX).
- Males produce two types of gametes: X and Y, while females produce only X gametes.
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