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Updated: October 29, 2026
"If rose-combed fowl were mated with single-combed fowl, the offspring were all rose-combed, but when these rose-combed fowl were mated, the offspring were again rose-combed and single-combed.... If gray rabbits were mated with black rabbits, their hybrids were all gray, the black seemingly disappearing, but when the second generation were mated, the progeny were again grays and blacks."