11. The Illness Is Inheritable
The girl’s family also carries the unusual gene for heterochromia iridium, which causes her eyes to appear blue. The reason for this is that the girls have a gene from the Caucasian side of the family and are bi-racial. Indeed, Morgan’s great-uncle and aunt have distinct eye colors.
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The fact that this illness primarily affects those with lighter skin tones and European ancestry makes Morgan even more exceptional.
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