Write the genotype of (i) an individual who is carrier of sickle cell anaemia gene but apparently unaffected, and (ii) an individual affected with the disease.

Explanation

To solve the question regarding the genotypes of individuals related to sickle cell anemia, we need to understand the genetic basis of the disorder. Sickle cell anemia is an autosomal recessive disorder, meaning that two copies of the sickle cell gene (HBS) are required for an individual to express the disease.

### Step-by-Step Solution:

1. **Identify the Genotype of a Carrier:**
- A carrier of sickle cell anemia has one normal hemoglobin allele and one sickle cell allele.
- The normal hemoglobin allele is represented as HBA, and the sickle cell allele is represented as HBS.
- Therefore, the genotype of an individual who is a carrier (but apparently unaffected) is **HBA/HBS**.
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