Mutations Made Easy

They don't teach genetics in high school anymore?If two heterozygotes for SCA mate, only (on average) one out of every 4 of their offspring will be homozygous SCA. Two out of four will be heterozygotes like their parents, and one out of four won't have any copies of the gene at all.

Do you think you could defend what he simply asserts?He asserts that progress exists in evolution but doesn't offer any reason to believe that. There certainly doesn't seem to be progress - the vast majority of organisms on Earth are remarkably simple. By weight, the vast majority of the Earth's biomass is bacteria.Life on Earth doesn't seem to be progressing over time. Oh, sure - there's a few random exceptions, but we would expect a few random species to get a little more complex over time, just at random. Getting more complex over time isn't something that even close to most living things seem to have a trend towards, though. Not even a significant fraction of them.