Parents are carrier for albinism. What will be the first three children :-

Options

A. Some normal, hetrozygous & albino
B. All normal
C. All heterozygous albino
D. No normal

Answer

To solve the question regarding the potential outcomes for the first three children of parents who are carriers for albinism, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Albinism**:
Albinism is an autosomal recessive disorder. This means that an individual must inherit two copies of the recessive allele (aa) to express the disorder. Individuals with one dominant allele (A) and one recessive allele (a) are carriers (Aa) but do not show the disorder.

2. **Genotypes of the Parents**:
Since both parents are carriers for albinism, their genotypes can be represented as:
- Parent 1: Aa (carrier)
- Parent 2: Aa (carrier)

3. **Gamete Formation**:
Each parent can produce two types of gametes:
- Parent 1 can produce gametes A and a.
- Parent 2 can also produce gametes A and a.

4. **Punnett Square**:
We can use a Punnett square to determine the possible genotypes of the offspring:
```
A a
----------------
A | AA | Aa |
----------------
a | Aa | aa |
----------------
```

5. **Offspring Genotypes**:
From the Punnett square, we can see the possible genotypes of the children:
- AA (normal, not a carrier)
- Aa (normal, carrier)
- Aa (normal, carrier)
- aa (albino)

6. **Phenotypic Ratios**:
The phenotypic ratio of the offspring can be summarized as:
- 1 AA (normal)
- 2 Aa (normal carriers)
- 1 aa (albino)

7. **First Three Children**:
Based on the ratios, the first three children could be:
- Child 1: Normal (AA)
- Child 2: Normal carrier (Aa)
- Child 3: Normal carrier (Aa)

Alternatively, if we consider the possibility of the order being different, it could also be:
- Child 1: Normal carrier (Aa)
- Child 2: Normal carrier (Aa)
- Child 3: Albino (aa)

### Conclusion:
The first three children of parents who are carriers for albinism could be one normal child (AA), two normal carrier children (Aa), and one albino child (aa). The specific order may vary, but the types of children will follow the ratios derived from the Punnett square.