Follow-up on the y gene

y =  yellow epidermis.  This year I grew two F5 plants for 46A2.3. Turns out one is "pink", i.e. clearly y/y, but the other is not "pink", i.e. normal reddish skin.  Therefore the F4 parent (46A2.3-F4) must have been y/+!  Saved seeds of 46A2.3 F5 y/y.  (see fruit on the right, below.)

46A2.3 F5 fruit:   y/y "pink" is on the right.