Genetics fun- breeding fun

[PrettyBirdRocky]

This is mainly just for fun for us. As we homeschool, we've gone through genetics, and it was one subject I enjoyed in school myself- still to this day I remember the cat diagram we did for color varieties.

I did start a thread of our story of our breeding program(?) for us for meat crosses.

Brahmas and Eggers mainly.

But I'm curious if what I've learned holds true. There is a statement in here somewhere(I have it bookmarked but I'm horrible at managing hyperlinks on my phone lol)

That a Light Brahma roo over a Buff Brahma hen lay sexlinked/sex ID at hatch chicks.

Is the same for Buff Brahma roo over Light Brahma hen?

We do know that we'll have tossups when it comes to our other couplings, which is no biggy, we love Easter eggers!

Most of what we hatch will be food, but I know we'll keep some pullets.

Roo: Buff Brahma (from local breeder we hatched last Aug.)

Our hens are:
Black Australorp x2
Buff Orpington
Light Brahma x2
Olive egger x2(Beardless) X3(beards)
Easter Eggers x4 (one is a light blue from local breeder her sire is a Blue Wheaten Amerucana x white leghorn)
Buff Brahma x4(hatchery) x3(local breeder)


*We do know the buff roo to our black Australorps will have a black with leakage, have hatched an Australorp/Orpington before so figured same basics

Thank you! This is all for fun! I'll try to keep track here too for our reference!

 

[The Moonshiner]

Light Brahma rooster over a Buff Brahma hen does not produce sexlinked/sex ID at hatch chicks.

Buff Brahma rooster over a Light Brahma hen does produce sexlinked/sex ID at hatch chicks.

 

[PrettyBirdRocky]

Light Brahma rooster over a Buff Brahma hen does not produce sexlinked/sex ID at hatch chicks.

Buff Brahma rooster over a Light Brahma hen does produce sexlinked/sex ID at hatch chicks.

Okay ty. Maybe I read it wrong. I had it saved lol so cockerels are light and pullets are buff, right?

 

[AinaWGSD]

Yes. Silver, like barred, is a dominant gene carried on the Z chromosome. Males are ZZ, females are ZW. If you breed a gold (buff) rooster to a silver hen, each chick will get a Z chromosome with no silver gene from the male. Each male chick from this cross will get a silver gene from the Z chromosome inherited from the hen. Because silver is dominant, these chicks will be silver (with gold leakage). Each female chick will inherent a W chromosome, which does not carry the silver gene because silver is only found on the Z chromosome, from the hen and a Z chromosome, which does not carry silver because the rooster doesn't have any silver genes to pass down to his chicks. Without a silver gene from either parent, females from this cross will be gold.

The other way around, assuming the rooster is homozygous (2 copies) for silver ALL of the chicks will inherit a silver gene from the rooster and will be silver (with gold leakage)

 

[PrettyBirdRocky]

Yes. Silver, like barred, is a dominant gene carried on the Z chromosome. Males are ZZ, females are ZW. If you breed a gold (buff) rooster to a silver hen, each chick will get a Z chromosome with no silver gene from the male. Each male chick from this cross will get a silver gene from the Z chromosome inherited from the hen. Because silver is dominant, these chicks will be silver (with gold leakage). Each female chick will inherent a W chromosome, which does not carry the silver gene because silver is only found on the Z chromosome, from the hen and a Z chromosome, which does not carry silver because the rooster doesn't have any silver genes to pass down to his chicks. Without a silver gene from either parent, females from this cross will be gold.

The other way around, assuming the rooster is homozygous (2 copies) for silver ALL of the chicks will inherit a silver gene from the rooster and will be silver (with gold leakage)

Awesome ty.

 

[The Moonshiner]

Yes. Silver, like barred, is a dominant gene carried on the Z chromosome. Males are ZZ, females are ZW. If you breed a gold (buff) rooster to a silver hen, each chick will get a Z chromosome with no silver gene from the male. Each male chick from this cross will get a silver gene from the Z chromosome inherited from the hen. Because silver is dominant, these chicks will be silver (with gold leakage). Each female chick will inherent a W chromosome, which does not carry the silver gene because silver is only found on the Z chromosome, from the hen and a Z chromosome, which does not carry silver because the rooster doesn't have any silver genes to pass down to his chicks. Without a silver gene from either parent, females from this cross will be gold.

The other way around, assuming the rooster is homozygous (2 copies) for silver ALL of the chicks will inherit a silver gene from the rooster and will be silver (with gold leakage)

 

[AinaWGSD]

View attachment 4067979

Yeah, that's how it felt typing it out! I think I started over twice. It's the exact same mechanism as sex linkage with barring, but for some reason so much harder to wrap my head around!

 

[PrettyBirdRocky]

Yeah, that's how it felt typing it out! I think I started over twice. It's the exact same mechanism as sex linkage with barring, but for some reason so much harder to wrap my head around!

But you described it so well! Thank you.

 

[PrettyBirdRocky]

My husband wants to know how it would work with dark Brahmas? Since they have a different pattern? Thank you for any information

 

[AinaWGSD]

Dark Brahma are partridge (pencilled) pattern on a silver base. Buff rooster over dark hens will result in the same sex linkage as buff rooster over light hens. I'm not familiar enough with how the pattern genes works to say what you could expect as to pencilling, partial lacing, or restriction of the black pigment (columbian) though.