Haploids are considered better genetic stock because they

Options

A. Need only half of the total nutrients
B. Are best for cytological studies
C. Grow better under all conditions
D. Form homozygous individuals on diplodization

Answer

### Step-by-Step Solution:

1. **Understanding Haploids**: Haploids are organisms or cells that contain only one complete set of chromosomes (n). This is in contrast to diploids, which have two sets (2n).

2. **Nutrient Requirements**: One of the advantages of haploids is that they require only half the total nutrients compared to diploid organisms. This is because they have fewer cells and less genetic material to support, making them more efficient in terms of resource utilization.

3. **Cytological Studies**: Haploids are particularly useful for cytological studies. Since they have only one set of chromosomes, it is easier to observe and analyze their genetic material without the complications that arise from having homologous chromosome pairs.

4. **Growth Conditions**: Haploids tend to grow better under various conditions. This is likely due to their simpler genetic makeup, which can lead to less genetic variation and more uniform responses to environmental stresses.

5. **Homozygosity**: Haploids are inherently homozygous because they possess only one allele for each gene. This makes them valuable for breeding programs and genetic studies, as they can produce offspring with predictable traits.

6. **Conclusion**: Therefore, haploids are considered better genetic stocks because they require fewer nutrients, are ideal for cytological studies, can grow better under various conditions, and are homozygous.