If you found a white sheep and wanted to determine its genotype, with what kind of animal would you cross it

When crossing white sheep with black sheep it is possible to observe the genotypes of the offspring to determine the genotype of the white sheep.
This will be even more efficient if we know the genotype of the black sheep.
In this case, if the crossing of the white sheep with the black sheep generates an offspring with all individuals with black fur, we can determine that the white sheep has the h0m0zygous recessive genotype.
If the offspring is composed entirely of individuals with white fur, we can state that the white sheep has the dominant h0m0zygous genotype.
If the offspring have most of their members with white fur and a small amount with black fur, it means that the white sheep has a heterozygous genotype.

In this case, the observation of the offspring's fur is essential to determine the genotype of the white sheep.

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