Answer:
From this, people often jump to the conclusion that the dominant trait is also the most common one. This isn’t always the case and there is no reason it should be.
Whether or not a trait is common has to do with how many copies of that gene version (or allele) are in the population. It has little or nothing to do with whether the trait is dominant or recessive.
Let’s take eye color as an example. The decision on whether to have brown eyes or not is pretty much controlled by a single gene, OCA2.
More on genetics
We can think of OCA2 as having two versions, brown and not-brown. The brown allele of OCA2 is dominant over the not-brown allele.
Nearly everyone in most of Africa has brown eyes. This isn’t because brown eyes are dominant over blue and green. Instead, it is because there are mostly brown alleles of OCA2 in the African population.
Northern Europe is a different story. In some parts of the continent, over 80% of the population has lighter colored eyes. Here the not-brown allele is more common even though it is recessive.
Now this allele isn’t exclusive, there are still brown-eyed folks in northern Europe. So why don’t their brown eyes dominate over time? Because in populations, dominant isn’t dominant over other people’s recessive gene versions. Your brown eyes can’t affect my kids’ eye color unless we get married.
Let’s do a thought experiment to make this clearer. To simplify things we’ll call brown eyes B and not-brown eyes b.
Explanation:
Answer:
It was an act of protest in which a group of 60 American colonists threw 342 chests of tea into Boston Harbor to agitate against both a tax on tea (which had been an example of taxation without representation) and the perceived monopoly of the East India Company.
Explanation:
German leaders would not settle for controlling only parts of the territories they wanted.
Answer:
The economic fragmentation that resulted in the Great Depression almost made isolationism an accepted reality in America. Lack of economic security, employment opportunities, as well as the general feel of material claustrophobia made international issues dwindle and wither away.
Explanation:
Ancient Romans spoke Latin, which spread throughout the world with the increase of Roman political power. Latin became the basis for a group of languages referred to as the “Romance languages.” Many Latin root words are also the foundation for many English words. The English alphabet is based on the Latin alphabet.
