The alteration of the gene expression happens in the womb as the organism is developing. The process is irreversible after the development process is completed.
It's like the Honey bees. The feed certain honey products to larvae to create worker bees, and other honey to products to larvae to create royalty. The worker bee can not "Choose" to be royalty after it has been fed worker bee honey as a larvae. It can't just go and eat Royalty honey and expect to develop into a queen after it transformed into a fully developed Honey bee.
Homosexuals don't chose to be gay after the process of morphogenesis is complete.
Don't live in fairytale world guy.
I suspect Vitamin D deficiencies may have huge effect on this process, and that's why darkskin has such a huge disadvantage in the northern regions.
Again, the whole meaning just went over your head. Read my previous post to understand how epigenetics work.
BTW, I have read about people changing their sexuality, as well as seen it with my own eyes from people in the party scene. There are two forms of homosexuality. One is a form that deals with hormones, and the other is a form that deals with neurotransmitters. In other words your body, and the other, your perception of things. If you alter these things you can change things, even out of the womb. Why do you think transgenders take hormones to change their sex?.
You have an agenda, and therefore don't want to see the truth for what it is. Very sad.
Also, vitamin D deficiency is not true for most blacks. That is another true lie that has been spread. The way dark skin deals with uv light, it may seem that the levels are low, but this isn't true. What is happening is the Vitamin D is slowly released into the system due to the melanin(dark skin) absorbing the uv light. Light skinned people don't hold uv light so more of it will go deeper into the skin and do it's job, BUT this can be dangerous and is why they can't deal with the sun like dark skinned people. Remember brown pigments ABSORB every bit of light it comes into contact with. Once the metabolites are tested to see the true vitamin d levels are, it has been shown that dark skinned people do have enough vitamin d, that will keep the body healthy. The ones who need to worry are sedentary people, and women who wear makeup in the north as these things make it hard for your body to absorb light, and get your metabolism going to make the vitamin D.
If it were true blacks in the north are low in vitamin D, then why are black women the highest out of all groups to have strong bones, then asians, then whites?. Vitamin D is what helps keep bones strong. WHat doctors are measuring is the levels of the vitamin d in the system,NOT if the system is actually using the vitamin D, which is why testing for metabolites is a better way to tell if your levels are good.
I can't find the study showing the vitamin D metabolites being good in blacks, but if you are serious about learning the truth you can do it yourself. Just look for vitamin d metabolites and blacks or dark skinned.
It's funny that I found a study showing dark skinned white females have more vitamin d, then their lighter peers, but for other races it's the opposite?. BULLshyt. This is white supremacy at work. What they did was use overweight women who most likely wore too much make up in the north, and stated vitamin D is low for blacks instead of looking at all the variables that will make the subjects have low vitamin D. Instead, due to white supremacy, they stated being BLACK is the reason you can't make vitamin D in good amounts EVEN THOUGH dark colors absorb every bit of light it comes into contact with. People didn't even question this, and just ran with it.
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0006477
"Contrary to previous studies across different ethnic backgrounds, this study within Caucasian UK females shows that fair skin types have lower levels of 25(OH)D compared to darker skin types with potential detrimental health effects. Public health campaigns advocating sun avoidance in fair skinned individuals may need to be revised in view of their risk of vitamin D deficiency."