Tuesday, June 14, 2011
High I.Q's: Coming from Mothers or Fathers
Nadene Goldfoot
We humans have 23 pairs of chromosomes, or 46 total in each of our cells. The 23rd pair are the sex chromosomes, the X and the Y. The X holds the key to our IQ.
Males have an X and a Y chromosome, while females have two X's. It is found that females average a little better than males on IQ tests. More males are both mentally retarded or have IQ's at 135 and above. What causes all this seems to be the X chromosome. This is because only 54 out of the 1,098 protein-coding genes on X functions like the Y, of which the few genes Y carries are related to sperm production and male physical characteristics.
If a gene on X chromosome mutates in a female, there is a backup gene on the 2nd X chromosome which can fill the gap. But in a male, his Y genes cannot step up to the bat and help out. This accounts for about 300 genetic diseases and disorders in males like color blindness, muscular dystrophy, and about 200 brain disorders.
The male gets his X gene from his mother in her mtDNA. If he gets a favorable X-related-genetic mutation, it will not be overridden by a gene on his Y chromosome. The problem is that he cannot pass this gene to his son, but will always pass it to his daughter. The daughter's paternal X-chromosome recombines with her mother's X-chromosome in the formation of the daughter's egg cells. There is a 50% chance that she will pass it to the next generation. In the female, however, a good mutation on one X might be overridden by a normal gene on her other X.
This causes me to wonder about me inheriting any of my paternal grandmother's genes from her haplogroup W. She was often distracted while cooking and would burn something and I do the same thing. Our body shape is similar. My very bright father must have inherited his IQ from her. I also would have some of her IQ abilities along with my mother's IQ genes.
Does this mean that my grandson from my son has not inherited my mt X chomosome which is in my H2a1 haplogroup? My background and love for dancing and art work is coming out in my grandson. Of course, the mother of his mother has those same qualities, giving him a double dose which is quite possible. I'm sure he's brighter than I am. Then my grandson did not get my X chromosome holding the IQ genes.
My son is gifted with a wonderful IQ, and his father had an extremely high IQ. We can assume that his father received a mutated X gene from his mother to have such an unusual high I.Q, and believe me, his mother was a sharp cookie, but so was his father. I see that under this way of passing the gene along, his daughter would get the mutated X but not his son! I suppose then that my son inherited his high IQ from me! And all along I thought it was his father. My daughter has both her father's single X with the IQ and my X with the IQ. Little do we daughters know how capable we can be.
I'm bright, but not half as bright as my brother! There's another case of having a very high IQ and it being the male sibling. This means that my brother could not have received the X chromosome from his equally bright father, but from his mother, but that's where I got my brains, from my father! My brother was lucky to have had a very bright mother.
I wondered if on that very male Y gene there could possibly be a segment labeled High IQ along with broad shoulders, bass voice, etc. Evidently not. If that were so, only males would inherit it. Females have two chances of getting smart but one of those chances can be canceled out by the other, and the male has to depend on getting his smarts from his mother by having a 50% chance to do so, but with his odds, will turn it into a much higher IQ
.
So, bright females. Thank your fathers for adding to your brains. There's nothing that says our mother's IQ genes aren't working for us as well. We have the double dose of 2 XX's. No wonder we can do two or three things at the same time. Bright males, your probabilites for having extremely higher IQ's than females are great. You can thank your mothers for that. We females can be counted on to have a nice steady above average IQ but have less problems mentally and physically than males.
Perhaps more mutations have been happening in females as we are using our brains more and succeeding in the world in all fields. This will certainly improve our sons and our daughters. As females' skills have improved throughout the ages, so have the males of the nations. I see this as a most positive step in group evolvement. It's important to keep females educated in order to elevate the whole community. Look at what happens in a controlled group whereby the females are held down and minds are not expanded. Look at the productivity of that group. It's not doing well at all. For the well-being of a nation, the best thing to do is to keep women educated.
Reference: DNA and Genealogy by Colleen Fitzpatrick and Andrew Yeiser
Reference: http://ghr.nlm.nih.gov/handbook/basics/howmanychromosomes
http://en.wikipedia.org/wiki/Heritability_of_IQ added 6/15/11
http://www.askabiologist.org.uk/answers/viewtopic.php?id=1958
http://www.cerebrals.com/board/viewtopic.php?f=12&t=3233
http://wilderdom.com/personality/L4-1IntelligenceNatureVsNurture.html
We humans have 23 pairs of chromosomes, or 46 total in each of our cells. The 23rd pair are the sex chromosomes, the X and the Y. The X holds the key to our IQ.
Males have an X and a Y chromosome, while females have two X's. It is found that females average a little better than males on IQ tests. More males are both mentally retarded or have IQ's at 135 and above. What causes all this seems to be the X chromosome. This is because only 54 out of the 1,098 protein-coding genes on X functions like the Y, of which the few genes Y carries are related to sperm production and male physical characteristics.
If a gene on X chromosome mutates in a female, there is a backup gene on the 2nd X chromosome which can fill the gap. But in a male, his Y genes cannot step up to the bat and help out. This accounts for about 300 genetic diseases and disorders in males like color blindness, muscular dystrophy, and about 200 brain disorders.
The male gets his X gene from his mother in her mtDNA. If he gets a favorable X-related-genetic mutation, it will not be overridden by a gene on his Y chromosome. The problem is that he cannot pass this gene to his son, but will always pass it to his daughter. The daughter's paternal X-chromosome recombines with her mother's X-chromosome in the formation of the daughter's egg cells. There is a 50% chance that she will pass it to the next generation. In the female, however, a good mutation on one X might be overridden by a normal gene on her other X.
This causes me to wonder about me inheriting any of my paternal grandmother's genes from her haplogroup W. She was often distracted while cooking and would burn something and I do the same thing. Our body shape is similar. My very bright father must have inherited his IQ from her. I also would have some of her IQ abilities along with my mother's IQ genes.
Does this mean that my grandson from my son has not inherited my mt X chomosome which is in my H2a1 haplogroup? My background and love for dancing and art work is coming out in my grandson. Of course, the mother of his mother has those same qualities, giving him a double dose which is quite possible. I'm sure he's brighter than I am. Then my grandson did not get my X chromosome holding the IQ genes.
My son is gifted with a wonderful IQ, and his father had an extremely high IQ. We can assume that his father received a mutated X gene from his mother to have such an unusual high I.Q, and believe me, his mother was a sharp cookie, but so was his father. I see that under this way of passing the gene along, his daughter would get the mutated X but not his son! I suppose then that my son inherited his high IQ from me! And all along I thought it was his father. My daughter has both her father's single X with the IQ and my X with the IQ. Little do we daughters know how capable we can be.
I'm bright, but not half as bright as my brother! There's another case of having a very high IQ and it being the male sibling. This means that my brother could not have received the X chromosome from his equally bright father, but from his mother, but that's where I got my brains, from my father! My brother was lucky to have had a very bright mother.
I wondered if on that very male Y gene there could possibly be a segment labeled High IQ along with broad shoulders, bass voice, etc. Evidently not. If that were so, only males would inherit it. Females have two chances of getting smart but one of those chances can be canceled out by the other, and the male has to depend on getting his smarts from his mother by having a 50% chance to do so, but with his odds, will turn it into a much higher IQ
.
So, bright females. Thank your fathers for adding to your brains. There's nothing that says our mother's IQ genes aren't working for us as well. We have the double dose of 2 XX's. No wonder we can do two or three things at the same time. Bright males, your probabilites for having extremely higher IQ's than females are great. You can thank your mothers for that. We females can be counted on to have a nice steady above average IQ but have less problems mentally and physically than males.
Perhaps more mutations have been happening in females as we are using our brains more and succeeding in the world in all fields. This will certainly improve our sons and our daughters. As females' skills have improved throughout the ages, so have the males of the nations. I see this as a most positive step in group evolvement. It's important to keep females educated in order to elevate the whole community. Look at what happens in a controlled group whereby the females are held down and minds are not expanded. Look at the productivity of that group. It's not doing well at all. For the well-being of a nation, the best thing to do is to keep women educated.
Reference: DNA and Genealogy by Colleen Fitzpatrick and Andrew Yeiser
Reference: http://ghr.nlm.nih.gov/handbook/basics/howmanychromosomes
http://en.wikipedia.org/wiki/Heritability_of_IQ added 6/15/11
http://www.askabiologist.org.uk/answers/viewtopic.php?id=1958
http://www.cerebrals.com/board/viewtopic.php?f=12&t=3233
http://wilderdom.com/personality/L4-1IntelligenceNatureVsNurture.html
Labels: chromosomes, dna, fathers, inheriting, IQ, mothers, mtDNA, mutate, sons, Ydna
