Who studied layers of rocks and fossils and had their studies helped change the age of the earth from 6,000 to 3 million years old?

James Hutton he did it

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.