Effect of the brown coat-coding gene (TYRP-1) on wool and skin color of Żelaźnieńska and Wrzosówka sheep. The study was conducted on randomly chosen ewes (Żelaźnieńska sheep – 93; Wrzosówka sheep - 133) during the shearing. Color of wool and skin was examined using device Chroma Mater CR-400 (Konica Minolta Sensing Inc., 2011). Taking into account the results of genotyping in order to the brown coat-coding gene (TYRP-1), 66 Żelaźnieska ewes and 74 Wrzosówka ewes were chosen to next stage of study where effect of the brown coat-coding gene (TYRP-1) on wool and skin color was assessed within breed and between breeds. Based on the results significant and highly significant differences in all color measurements of wool and skin between tested breeds were found, which should be connected with different wool color in each breed. However, there is striking difference in color of wool and skin regarding to a* color parameter, which were exactly opposite. It probably means that proportion of red or green color in skin is different than in wool. Differences in color values of wool depending on TYRP-1 gene genotypes were observed only for Wrzosówka sheep. The measurement of L* color parameter made on wool was highly significantly higher in the case of CC and CT genotypes in comparison to TT genotype. However, in the measurement of a* color parameter, the situation is opposite and homozygote TT had higher values compared to the others genotypes. No differences between wool and skin color of Żelaźnieńska sheep and no differences in skin color of Wrzosówka sheep were found. The results of studies on wool color, depending on genotype of the TYRP-1 gene in Wrzosówka sheep, make possibilities to conduct breeding work in order to develop standards for coat color for this breed.