My DS is revising GCSE science and we are both confused by the info on polydactyly so I need someone to explain to me in very very simple terms.
The book and the videos both suggest that polydactyly is genetically inherited and form a dominant allele. This to me means , if your parents, or one of them has polydactyly, you will too, but I suspect I've not got that bit? It also said there is no such thing as carriers. It differentiates this from CH, for example.
Why do they particularly teach polydactyly ? In my day , it was eye colour!
Anyway, this si why I am both intrigued and confused : I was born with an extra toe (contain yourselves with your peering at my feet, people!) but there is absolutely no history of extra digits in my family.
I learnt at school, in a random accidentally viewed science video that I was not some sort of genetic defect but , in fact, I mutated in the womb in a failure of differentiation. When I had my DSs I told midwives to count fingers and toes, and each time they treated me like I was bonkers.
Neither of my children have extra anything .
I am very very confused. The internet is confusing me more...
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Biologists please help!
18 replies
Piggywaspushed · 11/11/2019 18:48
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