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For many families with only daughters, this statistical probability is the primary explanation Let me say, it's normal to feel some disappointment when you find out the gender during pregnancy. The third combination, known as ff, [causes men to] produce more x sperm and have more daughters. according to dr
Langdon, the gene that is passed on from both parents, which causes some men to have more sons and some to have more daughters, may explain why we see the number of men and women roughly balanced in a population. There is nothing in the data that would suggest some men produce only boys A study of hundreds of years of family trees suggests a man's genes play a role in him having sons or daughters
Men inherit a tendency to have more sons or more daughters from their parents
A deeper understanding of who we are science often begins with simple questions—why does one family have all boys Why do some never have a daughter The answers, as they unfold, reveal not just statistics, but the intricate workings of life itself. It's all in the father's genes, according to scientists at newcastle university in england
They say a still undiscovered gene causes some men to father mostly sons, while others father mostly girls. I read that y chromosome is more fragile, and men under physical or mental stress are more likely to have girls due to biochemical/oxidative stress on y chromosome sperm Maybe that's why so many of the u.s Presidents seem to have more daughters
I also read that for the same reason xx chromosome sperm survive longer.
What doesn't seem to influence a baby's sex some folk tales say that attractive parents are more likely to have daughters, while tall, wealthy, or aggressive parents may produce more sons. Mr gellatly further explained, the gene that is passed on from both parents, which causes some men to have more sons and some to have more daughters, may explain why we see the number of men. But still, we've all heard stories from our grandparents about the reasons why a man only has daughters Let's look at it from a scientific point of view, based on the facts available to scientists so far
It is possible there are some men who are slightly more likely to have male children, but even to the extent that this were true, the differences are small
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