Question

The IgF-2R gene is autosomal and maternally imprinted. Copies of the gene inherited from your mother are silenced whereas those from your father are expressed. There are two alleles of this gene that can be followed because they encode two different forms of the IgF-2R gene that can be distinguished by size – one is 60K and the other is 50K. Tom and Betty have two children Jack and Jill. Tom has the 50K protein, Betty has the 60K protein, Jack has the 60K protein and Jill has the 50K protein. What are the possible genotypes of Tom and Betty? Jack has two children. One has the 50K protein and the other has the 60K protein. What are the genotypes of Tom and Betty?

Answer 1

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