Reptile & Amphibian Forums

I have a ? about dominant/co dom.Genetics.I have a giant alb. male which I bred to wild type(normal)females.They put out 2 different types of eggs/babies,some clutches were normal sized,some were about a 1/3 larger.Some clutches even had 1 of each! There is a BIG diff.in the eggs/babies,no question they are different.Of course,I'm gonna breed them to find out for sure,but that's many months away,I was just curious to see what y'all thought.Is it likely to be dom./co dom.genetics?PastelxPastel(dom.trait) produce Super Pastel in ball pythons,maybe Dom.,GiantxGiant will produce Super Giant??Oooohhh

From what I've read on Ron Tremper's site (www.leopardgecko.com) the giant trait is co-dom.

Your offspring sound like they're following the typical pattern for normal x co-dom giant. About half will inherit the normal gene from the giant parent and the other half will inherit the giant gene. Since the offspring only need one giant gene to display the trait your chances of getting a giant are about 50/50 with that crossing.

As you suggest, it is possible to get a super giant by crossing the offspring with each other or back with the giant parent. Your chances when crossing 2 giants would be 25% normal, 50% giant, and 25% super giant.

Good luck!!!

N.F.

Oh yea, forgot to mention...

Super giant leos are visibly bigger than giant leos. That's what makes it a co-dom trait rather than just a dominant trait.

Same is true with mack snows.

Thanks for the info,exactly what I needed to know.I hadn't really planned to breed him when I got him,but he just kept growing 'til he was 10" inches long and over 100G at 2 yrs.old,at his summer"fighting" weight.I can't wait to see what his weight goes up to when he starts feeding heavy and stops chasing the females around!