The study of mutations is easy in haploids as compared to diploids , because

Options

A. Haploids are more abundant in nature than diploids
B. All mutations, whether dominant or recessive are expressed in haploids
C. They are reproductively more stable than diploids
D. Mutagens penetrate in haploids more effectively than in diploids

Answer

To solve the question "The study of mutations is easy in haploids as compared to diploids because," we will analyze the options provided and understand the underlying concepts of haploids and diploids in relation to mutations.

### Step-by-Step Solution:

1. **Understanding Haploids and Diploids:**
- Haploids have a single set of chromosomes (n), while diploids have two sets (2n). This difference is crucial in how mutations are expressed.

2. **Expression of Mutations:**
- In haploids, any mutation that occurs will be expressed phenotypically because there is only one allele for each gene. This means that both dominant and recessive mutations will show their effects directly.
- In contrast, diploids carry two alleles for each gene. For a recessive mutation to be expressed, both alleles must be recessive. This can complicate the study of mutations because the effects may not be visible unless both alleles are affected.

3. **Evaluating the Options:**
- The first option states that haploids are more abundant in nature than diploids. This is incorrect and does not support the ease of studying mutations.
- The second option states that all mutations are either dominant or recessive and are expressed in haploids. This is true and is the main reason why studying mutations is easier in haploids.
- The third option claims that haploids are reproductively more stable than diploids, which is not accurate.
- The fourth option suggests that mutations penetrate haploids more effectively than diploids. This is also not a valid reason for the ease of studying mutations.

4. **Conclusion:**
- The correct answer is that all mutations, whether dominant or recessive, are expressed in haploids. This allows for straightforward observation and study of mutations without the complications present in diploids.

### Final Answer:
The study of mutations is easy in haploids as compared to diploids because all mutations, whether dominant or recessive, are expressed in haploids.