Male heterogamy found in case of

Options

A. XO type male in Grasshopper
B. XY type male in human
C. ZW male in birds
D. 1 and 2 both

Answer

To solve the question regarding male heterogamy, we will analyze the types of sex chromosomes present in different organisms. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand Male Heterogamy
Male heterogamy refers to a condition where males have two different sex chromosomes, making them heterozygous. This is in contrast to females, who typically have two of the same sex chromosomes (homozygous).

### Step 2: Analyze Grasshoppers
In grasshoppers, the male has an XO type of sex chromosome configuration. This means that males have one sex chromosome (X) and no second sex chromosome (O). The female grasshoppers have two X chromosomes (XX), making them homozygous. Therefore, grasshoppers exhibit male heterogamy.

### Step 3: Analyze Humans
In humans, males possess XY sex chromosomes, where X and Y are different. This makes male humans heterozygous. In contrast, females have two X chromosomes (XX), which are homozygous. Thus, humans also exhibit male heterogamy.

### Step 4: Analyze Birds
In birds, the male has ZZ sex chromosomes, which are the same (homozygous). The females have ZW sex chromosomes, which are different (heterozygous). Therefore, male birds do not exhibit male heterogamy.

### Step 5: Conclusion
From the analysis:
- Grasshoppers (XO type) and humans (XY type) both exhibit male heterogamy.
- Birds (ZZ type) do not exhibit male heterogamy.

Thus, the answer to the question is that male heterogamy is found in grasshoppers and humans.

### Final Answer:
Male heterogamy is found in case of:
1. Grasshoppers (XO type)
2. Humans (XY type)