Lesbians has also certain look when they get older (30+). A little bit lizardy one. Why?
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Good point on the bisexual angle.
If we were to assume that bisexuals have only one of the recessive gene from their parent, then they would continue to permeate the population.
Even so, if we consider homosexuals are those who get two of the recessive gene, they still would not carry on their genes.
That forces the gene to always remain a minority population of a bisexual parent category who would potentially be unaware of the gene they carry.
Would such a recessive trait persist? Why are other recessive traits, such as gingers, a dying breed, when their trait doesn't result in an anti-reproductive state?
Regarding double recessive genes not passing on: What about sperm donors/banks? Could keep that sort in the pool, even if not at high numbers. Just a thought. 🤔
The problem with that specific example isn't that there are less white people, there are actually more white people now than at any point in history. Rather, what's happened is that people in third world nations, mostly in Africa, have had population explosions.
A lower percentage doesn't always equate to a lower number. It can also, as is the case here, indicate that it just means another specific percentage of whatever your measuring is growing at a faster rate for that specific period of time.