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One of the earliest pedigrees traced an inherited illness in several European royal families.

- True
- False

Answer :

A) True. One of the earliest pedigrees traced an inherited illness in several European royal families.

A pedigree is a chart that traces the inheritance of a trait over several generations in a family. One of the most famous pedigrees involves the European royal families and the inherited illness of hemophilia.

Hemophilia is a disorder characterized by the inability of blood to clot normally. This disorder was particularly prevalent in European royal families, starting with Queen Victoria of Great Britain. Queen Victoria was a carrier of the hemophilia allele, which she inherited through a spontaneous mutation. She passed this allele on to some of her children.

Her daughters, who married into other European royal families, spread the hemophilia allele across Europe. Notable families affected include the royal families of Spain, Germany, and Russia. Hemophilia was present in so many royal families that it earned the name 'the royal disease.'

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