Check out the earlier diagram. Also some family lines are thin, for example, a friend of mine has no siblings; he has no first cousins on his mom’s side (she had no siblings); his mother had no first cousins on her dad’s side (he had no siblings that survived). Meanwhile, parents who have three kids have a good shot at passing on all their chromosomes.
So, you are saying that my husband’s family has a better chance passing on all of their chromosomes than I do because I have no siblings?
I have several first cousin marriages in both my mother’s and my father’s families in the early to mid 1800s. Does that mean that I have a double (or triple) shot at their available chromosomes?
Hopefully my 11 grandchildren have a full contingent of chromosomes (and no extras, please) from somewhere! I see the curly blonde hair and blue eyes amongst them (from my Scandanaivian ancestors) but also my husband’s chocolate eyes and dark hair from his side (Italian). LOL