The modern working definition of a gene is a portion (or sequence) of DNA that codes for a known cellular function or process (e.g. the function make melanin molecules). A single 'gene' is most similar to a single 'word' in the English language.The nucleotides (molecules) that make up genes can be seen as 'letters' in the English language. Nucleotides are named according to which of the four nitrogenous bases they contain. The four bases are cytosine, guanine, adenine, and thymine.he modern working definition of a gene is a portion (or sequence) of DNA that codes for a known cellular function or process (e.g. the function make melanin molecules). A single 'gene' is most similar to a single 'word' in the English language.
Where did humans first appear on Earth, and what were their society, technology, and culture? Humans first appeared on Earth during the Paleolithic Era, in the steppes and savannah of Africa, before migrating to Eurasia, the Americas, and Australia. These humans were hunter-foragers, changing their tools and culture to adapt to their surroundings. Describe earliest humans' technology & tools.
Second, as some of the prior answers pointed out, there's evidence that the first genetically modern people originated in Africa (they were apparently the southern population of h. sapiens heidelbergensis, whose nothern population eventually died out). But less reason to believe the first civilizations were there.sker's rating. Report Abuse. Ok, first of all, whether the first civilization was in Africa or not is not relevant to whether people are African nowadays. My direct ancestors a couple of generations back came from Ireland and Finland, but I am not Irish or Finnish, I'm American.