Which is more rare melanism or albinism?

Melanism is more rare than albinism.

Melanism is a genetic condition that causes animals to produce more melanin, the pigment that gives skin, hair, and eyes their color. Albinism is a genetic condition that causes animals to produce little or no melanin.

Melanism is caused by a mutation in the melanocortin 1 receptor (MC1R) gene. This gene controls the production of melanin. When the MC1R gene is mutated, it produces too much melanin, which results in melanism.

Albinism is caused by a mutation in one of several genes that are involved in the production of melanin. When one of these genes is mutated, it produces little or no melanin, which results in albinism.

Melanism is more rare than albinism because it requires two copies of the MC1R gene to be mutated. Albinism, on the other hand, only requires one copy of the gene to be mutated.