I'm not quite updated on the generally accepted theories for the banana inheritance pattern, but I stumbled upon this thread a couple weeks ago. Most other threads I've come across have opinions that swing back and forth between the banana inheritance pattern being an anomaly to it being a sex-linked trait, so it seems like it's all still up in the air. Rather than starting a new thread, I thought I'd just add these new findings to the OP's 'hypothetical scenario'.
link to youtube video:
https://www.youtube.com/watch?v=VjEiGnMYFdA&t=220s
link to NCBI summary (there is a link to the full paper, but you have to be a www.cell.com member, which I am not):
https://www.ncbi.nlm.nih.gov/m/pubmed/28690112/#fft
As I have not read the entire paper, and even if I have, I can not say for sure whether or not the OP's hypothesis is proven. It is quite interesting, and does provide a possible explanation for the Banana inheritance pattern. I do wish the OP was still around to comment (last online time was in 2015).
Anyway, let me know what you guys think.
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