Select the incorrect statement from the following

Options

A. (a) Small population size results in random genetic drift in a population
B. (b) Baldness is a sex-limited trait
C. (c) Linkage is an exception to the principle of independent assortment in heredity
D. (d) Galactosemia is an inborn error or metabolism

Answer

To solve the question of selecting the incorrect statement from the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A: "Small population size results in random genetic drift in population."**
- This statement is **true**. Small populations are more susceptible to random changes in allele frequencies due to genetic drift, which can lead to significant evolutionary changes over time.

2. **Statement B: "Baldness is a sex-limited trait."**
- This statement is **false**. Baldness is actually a sex-linked trait, specifically linked to the X chromosome. In contrast, a sex-limited trait is one that can be expressed in only one sex, regardless of whether the gene is present in both sexes.

3. **Statement C: "Linkage is an exception to the principle of independent assortment in heredity."**
- This statement is **true**. The principle of independent assortment states that genes for different traits segregate independently of one another. However, genes that are linked (located on the same chromosome) do not assort independently, which makes this statement correct.

4. **Statement D: "Galactosemia is an inborn error of metabolism."**
- This statement is **true**. Galactosemia is indeed an inborn error of metabolism caused by the deficiency of the enzyme GALT, leading to the accumulation of galactose in the blood.

### Conclusion:
After analyzing all statements, the incorrect statement is **B: "Baldness is a sex-limited trait."**

### Final Answer:
**B is the incorrect statement.**

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