Marsbar Chick and autosexing

that’s a fancy bit of software! Looks like I may have all cockerels then - not a great start to getting a rainbow of eggs in my basket 🤦‍♀️
Oh, this calculator isn't the best user interface, but it's addictive for us chicken lovers!! This spring I'm loading some of my favorite purebred eggs into the incubator- wheaten marans and welsummers. But also some crosses- olive eggers black copper marans and welsummers, and BCMs or Ayam Cemani on 'purebred' hens (Isbar, EEs, RIRs, etc). With all the combs, leg colors, and color combos, I'm hoping this calculator helps me determine heritage!
 
Actually looking at the calculator results - is it the other way round? Is the pullet barred
If you scroll down under the pictures, past all the genetics table, you'll see a white "Calculate Crossing" -- that will give you the offspring of the BCM/Crele paring!

High value web site, just a funky interface.
Actually looking at the calculator results - is it the other way round? Is the pullet barred?
 
Decided to go for some marsbar chicks for their olive eggs (cross between Cream Legbar (mum) and French Copper Marans (dad). When the first one hatched it had such clear autosexing markings of a female cream legbar, we were pretty confident it was going to be a girl, however, 3 and half weeks later, it seems that Marcie may in fact be Martin...I'm guessing autosexing isn't so reliable when crossing.
View attachment 3464592View attachment 3464593(We have 2 more which are 10 days younger, but the markings weren't as clear so the jury is still out on those)
I've read:
Male = Barring
Female = Solidish Black/no barring
And both carry dark olive egger genes, but only 1/2 chance of blue-egged 2nd generation genetic chicks.
But what's their specific genetic chances M/F of passing darker brown bloom genes to their next generation chicks?
 
When you do this sex link cross isn’t the rule that the dad influences the look of the baby girls the mom the look of the baby boys So barring shows up with boys and not the girls?
 
When you do this sex link cross isn’t the rule that the dad influences the look of the baby girls the mom the look of the baby boys So barring shows up with boys and not the girls?
Not exactly. Males are ZZ and females ZW. Meaning that males get a “Z” from each parent and females only from the father. So since barring is on that chromosome and the mother is barred, only her sons would inherit a copy. If the father is double barred and mother not, all offspring would be barred since the ”Z” goes to both genders
 
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Actually looking at the calculator results - is it the other way round? Is the pullet barred?
If you are using a CCL hen, she will have only one/single/unpaired "male" Z chromosome that only goes to her sons, while her puny "female" W chromosome would have none: so (dominant) B/+. The BCM roo will have no barring alleles to give at all: b/b. This means that male chromosome will ONLY go to her sons, while the daughters will be black. You can tell the barring allele in the hatchling sons by the white spot on their heads, while the girls will be solid. Later, as they grow their feathers, you will see the cockerels' barring show up. I just hatched 2 and got one of each. They follow this pattern perfectly. If other genetics are mixed in either parents' DNA, who knows what you will get???

If using another breed roo who had pale feathering, you might not be able to see the head spot. Or if the father was either hetero or homozygous for barring, all sex-linkage would completely disappear with barred or unbarred chicks of both sexes! His barred allele would go to either sex.
 

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