| I have two problems with your argument. To start, I'm going to assume that, by defective, you mean unintentional, correct me if I'm wrong. This is equivalent to the assertion that there is no feasible mechanism to preventing your germ cells from accumulating damage due to age, because otherwise, if it was maladapative, AND evolution could design a mechanism for preventing it, it would have. It's been long enough since mammals started reproducing sexually. This doesn't even make a little bit of sense though. It's clearly possible to keep the error rate constant. What's the difference between the germ cells in my body and the germ cells in my offspring's body. Why do those last longer? As you grow older, your offspring have more genetic diversity. It seems like the accumulation of mutations is intentional for older parents. The more similar your children are, the more likely they are to compete with each other, and the older you are, the more children you are already likely to have. So I propose that this is not a defect, but rather by design. Second, why on earth does this explain the hypothesis? Nerds are smarter on average, yes? Does it not make at least twice as much sense that smarter individuals are sexually attractive at older ages than athletic ones than reasoning that genetic defects are the thing that makes a person smart. |
Interesting question, I'm not sure but there is a selection mechanism with sperm creation, movement and implantation.
Ie your bad germline cells with too much damage don't make it to the next generation.