Smart Boys

George and I talked about this some last night.

Nature vs Nurture… I tend to think of both as bottlenecks for human development. The debate about which does more to me makes as much sense as debating which is better for a web application: Apache or MySQL? Both are involved and affect the end results. The debate should be about how to leverage the synergy of both, but that is another blog post.

We humans have 46 chromosomes. 23 from each parent which come in pairs. Males have an XY pair. Females have an XX pair. Brain Rules was the first I’ve read that ~1500 brain-related genes are on the X and ~100 on the Y (and losing ~5 every million years). So the X chromosome is quite important for determining brain development.

For boys, the one X they have comes from the mother. Girls inherit an X chromosome from both her mother or father. To set up the strong potential of great genes for boys, look to women who are really intelligent. That tells you there is a 50% shot for the boy to get a good X. If both of the woman’s parents are intellectuals, even better.

Be smart about it though… Don’t make an IQ score for the parents part of a prenuptual agreement.

My mother has occasionally said things I enjoy remind her of her father. That’s a biased sample. 

Frying Astronauts One Chromosone At a Time

A few conspiracy theorists who claim we never actually went to the Moon mention the inability of the space suits and craft of the time to hold out the cosmic radiation. Do they have enough time to gauge whether a human could survive a trip to Mars and back? Considering Mars no longer has a magnetic field (why it lost its atmosphere – I watch too much NOVA), getting to Mars will not provide a safe haven.

Maybe I am glad I didn’t become an astronaut?

Was Einstein Wrong about Space Travel? | Science Blog

While the astronaut twin is hurtling through space, Cucinotta explains, his chromosomes are exposed to penetrating cosmic rays. This can damage his telomeres—little molecular “caps” on the ends of his DNA. Here on Earth, the loss of telomeres has been linked to aging.

So far, the risk hasn’t been a major concern: The effect on shuttle and space station astronauts, if any, would be very small. These astronauts orbit inside of Earth’s protective magnetic field, which deflects most cosmic rays.

But by 2018, NASA plans to send humans outside of that protective bubble to return to the moon and eventually travel to Mars. Astronauts on those missions could be exposed to cosmic rays for weeks or months at a time. Naturally, NASA is keen to find out whether or not the danger of “radiation aging” really exists, and if so, how to handle it.