Which one of them is incorrect:

Options

A. Human males are heterogametic
B. Human males are homoogametic
C. Out of the total sperms produced, 50 percent carry the X-chromosome and the rest 50 percent has Y-chromosome be sides the autosomes (male digamety).
D. Humans produce two types of gametes during spermatogenesis.

Explanation

To determine which statement is incorrect regarding human male gametes, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Human Male Gametes**:
- Human males have two sex chromosomes: X and Y.
- The genotype for human males is XY, which means they have one X chromosome and one Y chromosome.

2. **Identifying Heterogametic vs. Homogametic**:
- Heterogametic refers to organisms that produce two different types of gametes concerning sex chromosomes.
- Homogametic refers to organisms that produce only one type of gamete concerning sex chromosomes.
- Since human males produce two types of gametes (one carrying X and the other carrying Y), they are classified as heterogametic.

3. **Analyzing the Statements**:
- **Statement A**: "Human males are heterogametic."
- This statement is **true** because males produce two types of gametes (X and Y).
- **Statement B**: "Human males are homogametic."
- This statement is **false** because males are heterogametic, not homogametic.
- **Statement C**: "Out of total sperm produced, 50% carry X chromosome and the rest 50% carry Y chromosome."
- This statement is **true** because during spermatogenesis, half of the sperm will carry the X chromosome and half will carry the Y chromosome.
- **Statement D**: "Human males produce two types of gametes during spermatogenesis."
- This statement is **true** as males produce two types of gametes (X and Y) during the process of spermatogenesis.

4. **Conclusion**:
- The incorrect statement is **Statement B**: "Human males are homogametic."

### Final Answer:
The incorrect statement is: **Human males are homogametic.**

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