In some of the cases children shows less mental ability as compared to their parents and vise-versa, this rule of heredity is known as what ?

Question

Accepted Answer

The correct answer to the question is Option 1: Law of Regression. Here's a detailed explanation supporting this choice:

1. **Explanation of the Law of Regression:**
   - The Law of Regression, also known as "regression to the mean," is a principle in genetics and statistics that describes how offspring tend to exhibit traits that are closer to the average of the population rather than the extreme traits of their parents. This means that if parents have extreme traits (either very high or very low), their children are likely to show traits that are less extreme and closer to the average. In the context of mental ability, if parents have exceptionally high or low mental abilities, their children are likely to have mental abilities that are closer to the average of the population. This explains why sometimes children show less mental ability compared to their parents and vice-versa.

2. **Why Other Options are Incorrect:**
   - **Option 2: Law of Selective Traits**
     - The Law of Selective Traits refers to the idea that certain traits are selected for or against in a population based on environmental pressures or other factors. This concept is more aligned with natural selection and does not specifically address the phenomenon of children having mental abilities that regress towards the mean compared to their parents.
   
   - **Option 3: Law of Maternal and Paternal Lines**
     - This option suggests a focus on inheritance patterns specifically through maternal or paternal lines. While certain traits can indeed be inherited through specific parental lines, this does not explain the regression towards the mean observed in mental abilities across generations.
   
   - **Option 4: Law of Chance**
     - The Law of Chance implies randomness in the inheritance of traits. While chance does play a role in genetic inheritance, the specific pattern of regression towards the mean is a well-documented statistical phenomenon rather than a random occurrence.

In conclusion, the Law of Regression accurately describes the observed pattern where children's mental abilities tend to be less extreme than those of their parents, making Option 1 the correct answer.