Which will not the genotype of pollen grain of a plant with genotype HHbbDdnnMMaa :-

Options

A. HbdNMa
B. HbDnMa
C. HbdnMa
D. All the above

Answer

To determine which genotype cannot be produced by the pollen grain of a plant with the genotype HHbbDdnnMMaa, we need to analyze the given genotype and the possible combinations of alleles that can be formed in the pollen grains.

### Step-by-Step Solution:

1. **Identify the Genotype of the Plant**:
The genotype of the plant is HHbbDdnnMMaa. This consists of:
- **H**: Homozygous dominant (HH)
- **b**: Homozygous recessive (bb)
- **D**: Heterozygous (Dd)
- **n**: Homozygous recessive (nn)
- **M**: Homozygous dominant (MM)
- **a**: Homozygous recessive (aa)

2. **Determine Possible Alleles for Each Gene**:
- For **H**: The only allele is H (since it is homozygous).
- For **b**: The only allele is b (since it is homozygous).
- For **D**: The possible alleles are D or d (since it is heterozygous).
- For **n**: The only allele is n (since it is homozygous).
- For **M**: The only allele is M (since it is homozygous).
- For **a**: The only allele is a (since it is homozygous).

3. **Construct Possible Genotypes of Pollen Grains**:
The pollen grains can have the following combinations based on the alleles:
- H (from HH)
- b (from bb)
- D or d (from Dd)
- n (from nn)
- M (from MM)
- a (from aa)

Thus, the possible genotypes for the pollen grains would be:
- H b D n M a
- H b d n M a

4. **Analyze the Given Options**:
Now we need to check the options provided in the question to see which one cannot be a genotype of the pollen grain:
- **Option 1**: H (valid)
- **Option 2**: B (invalid, should be b)
- **Option 3**: D (valid)
- **Option 4**: N (invalid, should be n)

5. **Conclusion**:
The genotypes that cannot be produced by the pollen grain are those that include capital letters for alleles that are homozygous recessive or do not match the alleles present in the parent plant. Therefore, the options that cannot be genotypes of the pollen grain are those with capital B and capital N.

### Final Answer:
The genotypes that will NOT be produced by the pollen grain of the plant with genotype HHbbDdnnMMaa are:
- Capital B (should be lowercase b)
- Capital N (should be lowercase n)