In which of the following mechanism of inheritance , male will be genotypically similar to of a female organism ?

Options

A. X - linked inheritance
B. Y - linked inheritance
C. Haplodiploidy mechanism
D. XX - XO mechanism

Answer

To solve the question regarding which mechanism of inheritance results in males being genotypically similar to females, we can analyze each option provided.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify a mechanism of inheritance where males and females have the same genotype.

2. **Evaluate the Options**:
- **Option 1: X-linked inheritance**:
- In X-linked inheritance, males have one X and one Y chromosome (XY), while females have two X chromosomes (XX). This means that males and females have different genotypes because males can express traits linked to their single X chromosome, whereas females can be carriers or express traits based on their two X chromosomes.
- **Conclusion**: This option is incorrect.

- **Option 2: Y-linked inheritance**:
- Y-linked inheritance involves genes located on the Y chromosome, which are only present in males. Females do not have a Y chromosome at all. Therefore, males and females are genotypically different in this case as well.
- **Conclusion**: This option is incorrect.

- **Option 3: XX exomechanism**:
- In the XX exomechanism, males are heterogametic (XY) and females are homogametic (XX). This means that males and females also have different genotypes in this mechanism.
- **Conclusion**: This option is incorrect.

- **Option 4: Haplodeploidy mechanism**:
- In haplodeploidy, seen in organisms like bees and wasps, males develop from unfertilized eggs and are haploid (having one set of chromosomes), while females develop from fertilized eggs and are diploid (having two sets of chromosomes). However, the haploid males and diploid females can be considered genotypically similar in terms of their genetic makeup because the male is a direct product of the female's genetic contribution (the unfertilized egg).
- **Conclusion**: This option is correct.

3. **Final Answer**: The correct mechanism of inheritance in which males will be genotypically similar to females is the **haplodeploidy mechanism**.