Why are my least white jumbos the heaviest?

[SweetieChicken234]

My quails are now 4+ weeks old. I started weighing them. They are supposed to be white but most have black and brown spots. I see a pattern here where my heaviest ones have the most brown on head and by the tail. My pure whites are the lightest. My brown patched ones are 11.75oz and my pure white ones ranged from 10.5oz to 9.5oz. I know males weigh less but I know all those pure white ones aren't all males. Is there some science to this with genetics?

 

[007Sean]

My quails are now 4+ weeks old. I started weighing them. They are supposed to be white but most have black and brown spots. I see a pattern here where my heaviest ones have the most brown on head and by the tail. My pure whites are the lightest. My brown patched ones are 11.75oz and my pure white ones ranged from 10.5oz to 9.5oz. I know males weigh less but I know all those pure white ones aren't all males. Is there some science to this with genetics?

The all white birds are English whites, they will weigh less than the ones with spots of brown. The ones with spots of brown are A&M Bobwhites, which isn't exactly true because there are not any 'true' A&M Bobwhites still in captivity.
So, the ones with spots are a mixture of the two. The true A&M's weighed around 12 to 14oz. English whites will weigh around 10 to 12oz.

 

[SweetieChicken234]

The all white birds are English whites, they will weigh less than the ones with spots of brown. The ones with spots of brown are A&M Bobwhites, which isn't exactly true because there are not any 'true' A&M Bobwhites still in captivity.
So, the ones with spots are a mixture of the two. The true A&M's weighed around 12 to 14oz. English whites will weigh around 10 to 12oz.

Well that's crazy. I'm brand new to this.. I bought "jumbo white coturnix" eggs and this is so confusing.

If you breed the English white to one of the larger ones will it produce larger pure white ones?

 

[007Sean]

Well that's crazy. I'm brand new to this.. I bought "jumbo white coturnix" eggs and this is so confusing.

If you breed the English white to one of the larger ones will it produce larger pure white ones?

One persons idea of a 'jumbo' is different from someone else's idea. Most wild types are not that big, typically, 9 to 10 oz. Some folks consider 10 to 12 oz as jumbo's. 14oz would definitely be considered 'jumbo'
Not necessarily, depends on the genetics of the birds you pair up! There could be multiple other reasons for a bird to be bigger than a normal size bird from the same genetical pool of breeding stock.