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Pedigrees are used to help geneticists understand how traits are inherited between generations. The Romanovs, a Russian royal family, had a history of hemophilia, a sex-linked disorder that is determined by a recessive allele on the X chromosome.
What is the best evidence to prove that Irene was heterozygous for hemophilia?

Respuesta :

Irene could have the similar trait within his/her genes. It could have been identified and was found similarly with the Romanovs. 

A pedigree chart is a diagram in which shows the pattern of inheritance of a particular trait from its ancestors to the next generation.
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The best evidence to prove that Irene was heterozygous for hemophilia is Alice carried the recessive allele.

What is a Sex-linked disorder?

A sex-linked disorder may be defined as those diseases or illnesses which are determined by genes located on the sex chromosomes.

The complete question is as follows:

  • Alice carried the recessive allele.
  • Alexandra carried the recessive allele.
  • Frederick carried the recessive allele.
  • Waldemar carried the recessive allele.

The pedigree is given below in which the blue color represents the characteristics of carriers of the X recessive allele.

Alice was Irene's mother, and since both Alice and irene have the allele, it is secure to deduce that Irene inherited the recessive allele from her mother Alice.

Therefore, it is well described above.

To learn more about Pedigree, refer to the link:

https://brainly.com/question/1658775

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