Pedigree analysis problem with solution (Example 17)
Q) Draw a pedigree that represents an autosomal dominant trait, sex-limited to males, and that excludes the possibility that the trait is Y-linked.
Reasons for excluding Y linkage in this pedigree
- Not all the sons of an affected male are affected.
- Here unaffected male has affected sons.
- Females cannot transmit Y linked disease since they don’t have Y chromosome. But this pedigree shows that the trait is through an unaffected female to her sons.