Bosbeetle
Terminally lost
Nope you get a chromosome from mom and dad, and your sperm are a mixture, with chromosomes from mom or dad, hence there is sperm cells with one x and there are sperm cells with one y. The only chromosome where you can clearly see the difference. If we would label moms with a m and dad's with a d you can have chr6m or chr6d in a sperm and the same for chr1 to chr 22. However they are not pure m or d's because of homologues recombination during the making of the sperm/egg cells, called meiosis.There should be no DNA originating from mom in the sperm before it enters the egg I'd have thought. It might be identical to DNA from mom's chromosomes, and it may be recombinated to form that but the only source of DNA in sperm should be daddy's genome, I'd have thought.
We have sex to mix up the chromosomes to stay ahead of pathogens that have much shorter generation times, but don't mix there genomes that much, at least according to the red queen theory. We need to run (evolutionary) to stay at the same place.
(Btw I think we need clearer names for mom and dad, and whose sperm and eggs were talking about, I think the mom and dad Im talking about would be grandma and grandpa in your reasoning )
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