No simple genetics for thedress - but does color vision affect compensation for lighting?

In my previous post, I asked whether the way that one sees the now famous dress might have a genetic influence and invited people to send me family data. I got data from 28 families (thank you very much!), and have some conclusions. First, this cannot be strictly genetic. There are examples of monozygotic twins that see the dress differently, and there is a significant minority of people who see it differently from one time to another. These observations are inconsistent with a purely genetic basis. In my own data, I have four families where both parents see blue and black; four of the 12 children in these families see white and gold. I also have nine families where both parents see white and gold; here seven of 20 children see white and gold. Thus, neither trait breeds true. However, there are some hints. I noticed that 64% of sibling pairs, and 8 of 9 sister pairs, see the dress the same way.  I also noticed that in families where the parents differ, 10/11 daughters see the dress as their father does, which is suggestive of an X-linked partially dominant factor. This led me to ask whether daughters preferentially show the paternal phenotype in families where the parents have the same phenotype. Of cases where I knew the gender of the child, daughters saw the dress as their father did 4/6 times (evenly divided between the two phentoypes). So, overall 14/17 daughters agree with their father. This is significantly different from expected (a simple two...
Source: On Genetics - Category: Genetics & Stem Cells Tags: 23andMe complex traits optical illusion sex-linked inheritance thedress Source Type: blogs