Whats interesting to me is that along with the autosomes (chr1-22) the sperm contributes either an X or Y sex chromosome. The X chromosome is large and carries a lot of important genes. The Y chromosome on the other-hand is much smaller and carries very few functional genes (primarily just SRY).
So If you think about it girls get ~5% more genetic material from their father than boys.
I couldn't be assed to do the math, not just chromosome size but also number of genes etc, get's tricky to quantify.
Fascinating to think about the variability introduced by having only a single copy of the X chromosome. Lot's of interesting genes in there, MAOA/MAOB (primary neurotransmitter breakdown pathways), AR (androgen receptor), OPN1LW/OPN1MW (red green color blindness), G6PD, etc.
Yes. Sperm cells are haploid. If the sperm that fertilizes the egg has an X chromosome, the baby will be female. If it has a Y chromosome, the baby will be male.
There are rare exceptions for genetic disorders relating to sex development, but generally speaking the above is true.
Whats interesting to me is that along with the autosomes (chr1-22) the sperm contributes either an X or Y sex chromosome. The X chromosome is large and carries a lot of important genes. The Y chromosome on the other-hand is much smaller and carries very few functional genes (primarily just SRY).
So If you think about it girls get ~5% more genetic material from their father than boys.
2.5% (but not really, also remember the chromosomes have different sizes).
this is probably why distribution of traits in men has fatter tails than in women.
I couldn't be assed to do the math, not just chromosome size but also number of genes etc, get's tricky to quantify.
Fascinating to think about the variability introduced by having only a single copy of the X chromosome. Lot's of interesting genes in there, MAOA/MAOB (primary neurotransmitter breakdown pathways), AR (androgen receptor), OPN1LW/OPN1MW (red green color blindness), G6PD, etc.
Yes. Sperm cells are haploid. If the sperm that fertilizes the egg has an X chromosome, the baby will be female. If it has a Y chromosome, the baby will be male.
There are rare exceptions for genetic disorders relating to sex development, but generally speaking the above is true.
I never explored this scientifically but I have this hunch that a man with more sisters than brothers will tend to have more daughters than sons
It's a common idea a with some decently strong evidence it's false, https://www.cnn.com/2020/02/18/health/boys-girls-run-in-fami...
ha :) thank you!