• Homozygous Black - this animal carries two copies of the dominant black allele for coat color and will only produce animals black in color. However, the black offspring could be red carriers if the animal is mated to a red carrier or red animal.
• Red Carrier - this animal carries one copy of the dominant black allele and one copy of the recessive red allele (red factor). This animal will be black in color but will pass along the recessive red allele to its offspring 50% of the time and could produce either black or red offspring depending on the mating.
• Heterozygous Black / Wildtype - this animal carries one copy of the dominant black allele and one copy of the wildtype allele. In beef breeds, this animal will most often be black in color but will pass along the wildtype allele to its offspring 50% of the time. The wildtype allele is associated with the Red-Black condition in Holstein cattle but has been poorly characterized in beef cattle. It has been reported that animals carrying the wildtype allele occasionally appear red when born and gradually turn black as they age. Additionally, some animals carrying the wildtype allele have been reported to have a reddish color at the base of the hair and black along the remainder of the hair shaft.
• Heterozygous Red / Wildtype - this animal carries one copy of the recessive red allele and one copy of the wildtype allele. The coloring of these animals is variable and has been poorly characterized, especially in beef cattle. Most often, this animal will appear red at birth but may gradually darken or turn black as it ages.
• Homozygous Red - this animal carries two copies of the recessive red allele. This animal will be red in color (also known as "true red") and will always pass on the recessive red allele to its offspring. However, this animal can produce offspring either red or black in color, depending upon the mating

Mating a Homozygous Black animal to a Homozygous Black animal will always produce Homozygous Black offspring and will eliminate the need to DNA test future offspring.

Mating a Homozygous Black animal to a Red Carrier will produce:

• 50% Homozygous Black offspring
• 50% Red Carrier offspring

Mating a Red Carrier animal to a Red Carrier animal will produce:

• 25% Homozygous Black offspring
• 50% Red Carrier offspring
• 25% Homozygous Red animals

If you are a beef breeder who has wildtype in your herd and are interested in breeding Homozygous Black animals, simply treat your Heterozygous Black / Wildtype animals as Red Carriers in the above mating schemes.

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Registration information for each animal or registration numbers of the sire and the dam.
Completed Request for Parentage and Myostatin Genotyping.
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