It would be harder to find out the relative effects of various filters: no children, children don't reproduce, grandchildren don't reproduce, etc.
Shouldn't the amount of children that don't reproduce be the same for men and women?
That sounds reasonable, but I'm not sure whether there are countervailing factors when we're talking about lineages. When I say I'm not sure, I mean that I'm just not visualizing the logic clearly enough to have an opinion.
Also, if we're tracking male chromosomes to find out whether men have had children, do we lose track of their daughters?
How much does it matter in ordinary life that descendants presumably follow a power law distribution (lots at the top) rather than a bell curve?
How much of cuckoldry is break-even? That is, a man might be raising anothe...
There's an idea I've seen a number of times that 80% of women have had descendants, but only 40% of men. A little research tracked it back to this, but the speech doesn't have a cite and I haven't found a source.
The reproduction rates for men and women (possibly for the whole history of the species) seems like the sort of thing which could be found out, but I'd like more solid information.