Jonathan_S wrote:They had heirs, just not heirs of their body. White Haven could have passed down through William Alexander and his children. So they hardly "required an heir".
I get the impression that while Allison had taken a particular interest in the genetic basis of incompatibility with regeneration (thanks the Honor having it, and slowly getting pieces shot off her) that she was hardly the only geneticist who could have rigged the scales against it when performing an in vitro fertilization. And she definitely wasn't the only one able to carry out a gene scan of a zygote to ensure one bearing that genetic trait wasn't transferred to a uterine replicator.
What she was was the only such person with the personal ties, and general busy-bodyness, to force the awareness of the availability of such techniques on the still somewhat traumatized Emily. Emily was so traumatized by what happened to her than 40 years later she wasn't even really able to articulate why she'd instinctively shied away from having children. So she certainly wasn't ready or able to identify what terrified her and reach out to specialists to find out if her concerns could be mitigated.
Exactly. It took Allie to make Emily look past her own traumas, and realize that she could have a child, without passing on the non-regeneration gene. And she was just the geneticist to make it happen.