I also think it’s coded in the dna, like different operating systems.
There was a paper cataloging intersex in 10 or 12 degrees ranging from strongly intersex to strongly “fixed” for lack of a proper term.
Gg4 is a line known to moderately intersex, it’s quite likely you got a sample of a more severe example.
Seeds vary in color at maturity from solid tan to solid almost black, sometimes sporting stripes or spots. Size also varies alot even on a single plant… from the circumference of a grain of rice to as big as a sweet pea. On thing they all have in common is a firm shell, think store bought pasta hehe.
Some pale or soft seeds can still germinate but if you got plenty of very healthy seedsit’s not unreasonable to toss those pale ones