Find out the correct statement .

Options

A. Genetic makeup of the egg determines the sex of the child in human.
B. Genetic makeup of the sperm determines the sex of the child in human.
C. XO and XY type of sex determination is an example of female heterogamety .
D. ZZ and ZW type of sex determination is an example of male heterogamety .

Answer

To solve the question, we need to evaluate the statements provided and determine which one is correct. Here’s a step-by-step breakdown:

### Step 1: Analyze the First Statement
**Statement:** The genetic makeup of the egg determines the sex of the child in humans.

**Evaluation:** This statement is incorrect. In humans, the sex of the child is determined by the combination of sex chromosomes contributed by both parents. The mother contributes an X chromosome (since she has XX), while the father can contribute either an X or a Y chromosome. Therefore, the egg alone does not determine the sex.

**Hint:** Remember that in sexual reproduction, both parents contribute to the genetic makeup of the offspring.

### Step 2: Analyze the Second Statement
**Statement:** The genetic makeup of the sperm determines the sex of the child in humans.

**Evaluation:** This statement is correct. The sperm can carry either an X or a Y chromosome. If the sperm carrying an X chromosome fertilizes the egg, the child will be female (XX). If the sperm carrying a Y chromosome fertilizes the egg, the child will be male (XY). Thus, the sperm's genetic makeup is crucial in determining the sex of the child.

**Hint:** Focus on the role of the male gamete (sperm) and its contribution to sex determination.

### Step 3: Analyze the Third Statement
**Statement:** XO and XY type of sex determination is an example of female heterogamy.

**Evaluation:** This statement is incorrect. In humans, the female is homogametic (XX), while the male is heterogametic (XY). Therefore, this statement misrepresents the sex determination system in humans.

**Hint:** Consider the definitions of homogametic and heterogametic and how they apply to males and females.

### Step 4: Analyze the Fourth Statement
**Statement:** ZZ and ZW type of sex determination is an example of male heterogamety.

**Evaluation:** This statement is also incorrect. In species with ZZ/ZW sex determination (such as birds), it is the female that is heterogametic (ZW), while the male is homogametic (ZZ). Thus, this statement is not accurate.

**Hint:** Recall that different species can have different mechanisms of sex determination.

### Conclusion
After evaluating all the statements, we find that only the second statement is correct: "The genetic makeup of the sperm determines the sex of the child in humans."

### Final Answer
The correct statement is: **The genetic makeup of the sperm determines the sex of the child in humans.**