This trait is attached to horses that Carry Flaxen.
Flaxen is a lightening of the mane and tail, giving a blonde appearance.
Flaxen is recessive; a horse needs to be homozygous with two copies of the gene (ff) for it to be visible.
Flaxen also only shows on Chestnut-based (ee) coats. Horses with (E_) will not express Flaxen.

A heterozygous carrier with only one copy of the gene (nf) will not express Flaxen.

Genotype: nf, or ff on a E_ base
Locus:  Not shared with any known genes
Horses with 'nf' will be noted as 'Carrying Flaxen' but will not show the gene.

Expression of carried Flaxen:

• Coat: Not affected.
• Mane and Tail: Not affected.
• Skin: Not affected.
• Eyes: Not affected.
• Hooves: Not affected.