Okay, I know that eye colour is mono-allele dominant-recessive, with Brown Dominant, blue recessive, and Bb sometimes green.
I don’t know, however, if eye-shape, that is, western vs. asiatic (epicanthic fold) is inherited seperate from or combined with, eye colour, if it’S dominat-recessive, mono- or multi-allele.
So if hypothetically, a group of blue-eyed Westerns met and married with a group of black/brown-eyed Asians, how would the F1 and F2 generation eyes look like? I know the F1 would be Bb for eye colour, most likely expressed as brown (but maybe lighter than the parents?), and the F2 would split into 3:1 Mendel ratio of brown (BB, Bb) and blue (bb). But would the F1 have western shape eyes, and the F2 follow the Mendel ratio for eye shapes, too? Would we see in the F2 people with blue eyes and Asian shapes, and brown eyes with western shapes, or would they stay combined?
Hm, that’s interesting. So all the upset blue-eyed husbands of brown-eyed children being cuckoos can calm down again, and all our little exercises on matching children to parents in biology class have to be scrapped.
I’m also surprised about green eyes - the last I heard was that fat globules and their reflection of light makes eyes green, but apparently that’s not the reason. They mention lipids for amber eyes, though.
I’m still confused about violet eyes - I only know them from fanatasy literature. The wiki article lists violet in the intro, but in the chart/ list in the main article, only red (albino) eyes are given. Anybody know what’s with that?
Human albino eyes most often appear a violet or light yellow color, but under the right lighting some can appear red…
As for the OP’s question, I am very eager to see knowledgeable answers. I know a lot of mixed people with Asian ancestry and based on them, I would say both eye shape and color are on a spectrum and that Asian eye shape can often be paired with non-brown eyes.