Cris-cross inheritance is characteristics of

Options

A. Y-linked
B. X-linked
C. X-linked and Y-linked
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding Criss-Cross Inheritance**: Criss-cross inheritance refers to a pattern of inheritance where a trait or genetic disorder is passed from one generation to another, typically through the female parent to her male offspring. This means that the trait skips a generation in females and appears in males.

2. **Identifying the Type of Traits**: This type of inheritance is most commonly associated with X-linked disorders. X-linked disorders are those that are caused by mutations in genes located on the X chromosome.

3. **Role of Female Carriers**: In X-linked disorders, females can be carriers of the mutated gene because they have two X chromosomes. If one X chromosome carries the mutation, the other normal X chromosome can mask the effects of the mutation, meaning the female may not express the disorder but can pass the mutated X chromosome to her offspring.

4. **Transmission to Male Offspring**: When a carrier female has children, there is a chance that she will pass the mutated X chromosome to her sons. Since males have only one X chromosome (and one Y chromosome), if they inherit the mutated X chromosome, they will express the disorder.

5. **Conclusion**: Therefore, criss-cross inheritance is characteristic of X-linked disorders, where the trait is passed from mother (carrier) to son (affected) and can skip generations in females.

**Final Answer**: Criss-cross inheritance is characteristic of X-linked disorders.

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