Inheritance of intelligence, gender selection
- What do you think about the issue?
Inheritance of intelligence and X chromosome
The inheritance of intelligence is believed to be multifactorial. However, many intelligence genes are located on the X chromosome. The boy only has one X chromosome which comes from his mother. So for men who wants smart sons, you best bet is to marry a smart woman. For ladies, checking out your potential mother-in-law, not your father-in-law, according to Prof. Turner.
Intelligence and the X chromosome by Gillian Turner Lancet 1996; 347; 1814-1815
Intelligence correlated with semen quality
Higher levels of intelligence are also correlated with higher levels of sperm quality: sperm concentration, sperm count and sperm motility.
Men who scored high on a battery of intelligence tests tended to have higher counts of healthy sperm, while low scorers tended to have fewer and more sickly sperm.
Commun Integr Biol. 2009 Sep;2(5):385-7.
For relatively young children that put them at a clear and long-term disadvantage in the educational system.
Birthdate Efficts: A review of the Literature from 1990-on by EDA Sykes; JF Bell; and CV Rodeiro. University of Cambridge, Feb. 2009
Daughters increase longevity of fathers
Daughters increase longevity of fathers by, on average, 74 weeks per daughter born while number of sons did not have a significant effect on paternal longevity.
Source: Am J Hum Biol. 2006 May-Jun;18(3):422-5.