The female children of a haemophilic man and a carrier woman are likely to be

Options

A. All haemophilic
B. Half haemophilic, half carrier
C. All normal
D. All carrier

Answer

To determine the likely outcomes for the female children of a hemophilic man and a carrier woman, we can analyze the genetics involved.

### Step-by-Step Solution:

1. **Understanding Hemophilia**: Hemophilia is a genetic disorder that affects the blood's ability to clot. It is typically inherited in an X-linked recessive manner. This means that the gene responsible for hemophilia is located on the X chromosome.

2. **Genotypes of the Parents**:
- The hemophilic man has the genotype **X^hY** (where X^h represents the X chromosome with the hemophilia allele).
- The carrier woman has the genotype **X^HX^h** (where X^H represents the normal X chromosome and X^h represents the X chromosome with the hemophilia allele).

3. **Possible Gametes**:
- The father (hemophilic man) can produce two types of gametes: **X^h** (hemophilic X chromosome) and **Y** (Y chromosome).
- The mother (carrier woman) can produce two types of gametes: **X^H** (normal X chromosome) and **X^h** (hemophilia X chromosome).

4. **Punnett Square Analysis**:
- We can set up a Punnett square to visualize the possible combinations of the gametes from both parents.

| | X^H (from mother) | X^h (from mother) |
|----------|-------------------|-------------------|
| X^h (from father) | X^HX^h (carrier daughter) | X^hX^h (hemophilic daughter) |
| Y (from father) | X^HY (normal son) | X^hY (hemophilic son) |

5. **Outcomes for Female Children**:
- From the Punnett square, we can see that the possible outcomes for female children are:
- **X^HX^h**: This daughter is a carrier (not affected by hemophilia).
- **X^hX^h**: This daughter is hemophilic (affected by hemophilia).
- Therefore, the female children of a hemophilic man and a carrier woman are likely to be:
- Half hemophilic (X^hX^h)
- Half carrier (X^HX^h)

### Conclusion:
The female children of a hemophilic man and a carrier woman are likely to be half hemophilic and half carrier.

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