Single comb rooster X Rose comb hen

[Memoli]

Hello! I have done some research but still not sure I understand clearly. I have a wyandotte rooster with single comb and two hens with rose combs. (Their parents had all rose combs) What will their offspring be like? Thanks...

 

[Jenessa_096]

My rooster had a rose comb and when we hatched out eggs this was our results. The RIR chicks had one rose comb one straight comb. The cream legbar chicks had both rose combs. And then my chickens Beccas chicks, which I don’t know her breed had both straight combs. Basically a mix, here’s attached photos to help! The first three are the 3 that turned out to be boys. (RIR, and unknown mix.) 4th is the father also unknown breed. Then Luna my cream legbar, Maria my RIR and Becca my mystery breed. Last two are the Cream Legbar chicks that we kept because both were pullets.

 

[CaramelKittey]

Rose combs are dominant to single combs, so all the offspring should have rose combs, IF the hens are homozygous for the rose comb gene. You will find out pretty quickly if one is heterozygous for a rose comb, because when mated with a single comb rooster, 50% should have single combs and 50% should have rose combs.

 

[Memoli]

Thanks for the replies

 

[DarJones]

Rose comb is from an inversion on chromosome 7 that by the way happens to clip the end of an adjacent gene affecting sperm motility. There are two documented alleles that cause rose comb with one of them repairing the sperm gene. The alleles are usually designated R1 (clips the sperm motility gene) and R2 (repairs the sperm motility gene but still gives rose comb). R1 is very common and R2 is very rare.

Single comb is from a combination of a normal single comb gene on chromosome 1 plus the effect of the rose comb inversion on chromosome 7. If the inversion is not present, the result is a single comb bird whether male or female. If the inversion is heterozygous, meaning one chromosome has it and the other doesn't, you get a fleshy rose comb. If both copies of chromosome 7 have the rose comb inversion, you get a rose comb bird. Caveat that there are several modifier genes that also affect comb size and shape and are not on chromosomes 1 or 7. Pea comb is a variation of the single comb gene on chromosome 1. If you combine pea comb with rose comb, you get walnut comb.

 

[RoostersAreAwesome]

My rooster had a rose comb and when we hatched out eggs this was our results. The RIR chicks had one rose comb one straight comb. The cream legbar chicks had both rose combs. And then my chickens Beccas chicks, which I don’t know her breed had both straight combs. Basically a mix, here’s attached photos to help! The first three are the 3 that turned out to be boys. (RIR, and unknown mix.) 4th is the father also unknown breed. Then Luna my cream legbar, Maria my RIR and Becca my mystery breed. Last two are the Cream Legbar chicks that we kept because both were pullets.

If the hen you don’t know the breed of is the white one, she’s a Delaware.

 

[Jenessa_096]

If the hen you don’t know the breed of is the white one, she’s a Delaware.

Thank you!!!!!

 

[Jenessa_096]

If the hen you don’t know the breed of is the white one, she’s a Delaware.

It’s really interesting, she was my first broody!