To solve the question of the percentage of very light (albino) offspring when a mulatto female marries a very light (albino) male, we can follow these steps:
### Step-by-Step Solution:
1. **Understanding the Genetics of Skin Color**:
- Skin color in humans is a polygenic trait, influenced by multiple genes. In this case, we consider three genes: A, B, and C.
- Each gene has a dominant and a recessive allele. The dominant alleles contribute to darker skin tones, while the recessive alleles lead to lighter skin tones, including albino.
2. **Defining the Genotypes**:
- The mulatto female is heterozygous for all three genes, meaning her genotype can be represented as AaBbCc (where A, B, and C are dominant alleles, and a, b, and c are recessive alleles).
- The albino male has the genotype aabbcc, as he expresses the recessive trait for all three genes.
3. **Gamete Formation**:
- The mulatto female can produce several types of gametes due to her heterozygosity. The possible gametes from AaBbCc are:
- ABC, ABc, AbC, Abc, aBC, aBc, abC, abc
- The albino male can only produce one type of gamete: abc.
4. **Punnett Square Analysis**:
- To determine the offspring's genotypes, we can use a simplified approach since the albino male can only contribute abc.
- When we cross the gametes of the mulatto female with the albino male, we can analyze the combinations:
- Each gamete from the female will combine with the abc from the male.
5. **Identifying Offspring Genotypes**:
- The offspring genotypes will be:
- ABC (darkest skin)
- ABc (darker skin)
- AbC (darker skin)
- Abc (intermediate skin)
- aBC (intermediate skin)
- aBc (lighter skin)
- abC (lighter skin)
- abc (albino)
- Out of these combinations, only the abc genotype corresponds to the albino phenotype.
6. **Calculating the Percentage of Albino Offspring**:
- Out of the 8 possible combinations of offspring, only 1 combination results in the albino phenotype (abc).
- Therefore, the percentage of very light (albino) offspring is:
\[
\text{Percentage of albino offspring} = \left(\frac{1}{8}\right) \times 100 = 12.5\%
\]
### Final Answer:
The percentage of very light (albino) offspring from the cross between a mulatto female and an albino male is **12.5%**.
