To a heterozygous curly (dominant) haired mother and straight haired father, 8 children are born. The ratio of curly and straight haired will be

Options

A. `6:2`
B. `4:4`
C. `2:6`
D. `3:5`

Explanation

To solve the problem of determining the ratio of curly to straight-haired children born to a heterozygous curly-haired mother and a straight-haired father, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Genotypes**:
- The mother has curly hair, which is a dominant trait. Since she is heterozygous, her genotype is **Cc** (where C = curly hair, c = straight hair).
- The father has straight hair, which is a recessive trait. His genotype is **cc**.

2. **Set Up a Punnett Square**:
- To find the possible genotypes of the offspring, we can set up a Punnett square. The alleles from the mother (Cc) will be on one side, and the alleles from the father (cc) will be on the other side.

```
C | c
-----------------
c | Cc | cc
-----------------
c | Cc | cc
```

3. **Determine the Offspring Genotypes**:
- From the Punnett square, we can see the possible genotypes of the offspring:
- **Cc** (curly hair) - 2 occurrences
- **cc** (straight hair) - 2 occurrences

4. **Calculate the Phenotypic Ratio**:
- The phenotypic ratio of the offspring can be calculated based on the genotypes:
- 2 curly-haired (Cc) children
- 2 straight-haired (cc) children
- Therefore, the ratio of curly to straight-haired children is **2:2**, which simplifies to **1:1**.

5. **Calculate for 8 Children**:
- If there are 8 children, we can use the ratio:
- Curly-haired children = 1/2 of 8 = 4
- Straight-haired children = 1/2 of 8 = 4
- Thus, the ratio of curly to straight-haired children among the 8 children is **4:4**.

### Conclusion:
The ratio of curly to straight-haired children will be **4:4** or simplified to **1:1**.