This is genetic nonsense. If you have one recessive and one dominant gene, half your kids get the recessive gene and half the dominant gene.The proportion of recessive genes in the population is not changed.
I read somewhere when I was a kid that natural redheads are about 5% of the population. Looks to me like the percentage is holding.
Is that why they call you the professor? Hell, you couldn't even get the crew of the darn island! ;o)