Blk female seeking Rockingham or mixed guy

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In order to understand how sex-linked crosses work, an understanding of avian genetics is required. The first thing to note is that the genetic basis for sex determination is different from that for mammals, as shown below. Specific breeds or strains of chickens can be developed where it is possible to tell male and females apart at hatch based on their physical appearance, often plumage color.

Blk female seeking Rockingham or mixed guy

For example, a Delaware female mated to a New Hampshire or Rhode Island Red male is a sex-link cross where the males will have the Delaware feather pattern of their mother and females will have a solid red feather pattern similar to their father. If, however, you mate a Delaware male with a New Hampshire or Rhode Island Red female, all the offspring will have the same Delaware feather pattern. The black sex-link also known as Rock Reds is produced by crossing a barred hen with a non-barred rooster. The male offspring are feathered barred like their mother and the female offspring are a solid color, typically black.

Blk female seeking Rockingham or mixed guy

At hatch both sexes have black down, but the males can be identified by the white dot on their he. As ly indicated, males feather out with the Barred Rock pattern along with a few red feathers, while females feather out solid black with some red in the neck feathers. The red sex-link also known as Golden Comet, Gold Star, or Cinnamon Queen depending on the specific cross used are produced by a of different crosses. Males hatch out white and can feather out to pure white or with some black feathering depending on the cross.

Females hatch out buff or red, depending on the cross, and they feather out buff or red. A sex-link trait that has been used in sexing day-old broiler chicks is the speed of feather growth. Slow feathering in chickens is caused by a dominant gene referred to as K on the Z chromosome remembering that males are ZZ and females are ZW. The difference in the length of the primary and covert wing feathers can be seen between one to three days from hatching. After this age it is not possible to use this sex-link cross for sexing chickens.

Fast-feathering: Primary feathers are long and the coverts are shorter than the primaries. Slow-feathering: The primary wing feathers are short and the coverts are as long as the primary feathers. Fast-feathering male chickens have two copies of the recessive form of the gene indicated as kk. The sex-linked cross involves mating a male with two recessive k genes i.

Blk female seeking Rockingham or mixed guy

Offspring from this cross will be fast-feathering females like their father and slow-feathering males like their mother, as shown below. You are here Home ยป Sex-Linked Crosses. Sex-Linked Crosses.

Blk female seeking Rockingham or mixed guy

It is important to remember that the offspring are hybrids and will not breed true. Examples of sex-linked crosses for egg production The black sex-link also known as Rock Reds is produced by crossing a barred hen with a non-barred rooster. Barred Plymouth Rock Female. Rhode Island Red Male. Day-old female. Day-old male.

Blk female seeking Rockingham or mixed guy

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