gene pool

This created what scientists call a genetic or population bottleneck, meaning that its gene pool became much smaller.

Pet cats’ Y chromosomes hold clues about these encounters, carrying genes that can enter the gene pool only through mountain cat fathers.

Over time, they would have diluted Neandertal DNA from the human gene pool down to the small amounts that remain today, he says.

You could potentially be making the gene pool weaker and more susceptible to mange.

After 40,000 years ago, additional migrations into Europe by people with little or no Neandertal ancestry would have further diluted Neandertal DNA from the human gene pool, he says.

Jews and Arabs reach back, via philology as well as place of origin, to the same gene pool.

Another factor - men functionally have unlimited bullets to shoot to expand their presence in the gene pool.

Obama also has Irish roots, even further proof of how important the Emerald Isle is to our national gene pool.