Select the incorrect statement :

Options

A. Frequency of certain genes in a population change over several generations resulting in evolution
B. Reduction in weight of the organism due to starvation is genetically controlled
C. Low weight parents can have heavyweight progeny
D. Traits which are not inherited over generations do not cause evolution

Explanation

To solve the question of identifying the incorrect statement regarding heredity and evolution, we will analyze each statement provided:

### Step 1: Analyze Statement 1
**Statement:** The frequency of a certain gene in the population changes in several generations, due to which the result is evolution.
**Analysis:** This statement is correct. Evolution is driven by changes in gene frequencies over generations, influenced by factors such as natural selection, mutation, and genetic drift.

### Step 2: Analyze Statement 2
**Statement:** Reduction in the weight of the organism is because their starvation is being controlled genetically.
**Analysis:** This statement is incorrect. Weight loss in organisms can be influenced by various external factors, such as availability of food, environmental conditions, and lifestyle choices. It is not solely determined by genetic factors.

### Step 3: Analyze Statement 3
**Statement:** Low weight parents can have heavy weight progeny.
**Analysis:** This statement is correct. Offspring can inherit traits that are not necessarily a direct reflection of the parents' physical characteristics due to the complex nature of genetics and environmental influences.

### Step 4: Analyze Statement 4
**Statement:** Traits which are not inherited over generations do not cause evolution.
**Analysis:** This statement is correct. For a trait to contribute to evolution, it must be heritable; traits that are not passed down do not affect the genetic makeup of future generations.

### Conclusion
After analyzing all statements, the incorrect statement is **Statement 2**: "Reduction in the weight of the organism is because their starvation is being controlled genetically."

### Final Answer
The answer to the question is **Option B**.

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