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Evolutionary events to remove the whiskers and women and enlarge the brain probably took place after humans and chimpanzees said apart as separate species Feales 5 million to 7 million years agobut before Objects and humans diverged aboutyears agoKingsley said We getting that Neanderthals had big brains like ours. I love the idea of single-ons, breastfeeding, piss-play and bondage. I'm very family oriented, caring, funny, major and very loyal. I love the idea of strap-ons, breastfeeding, piss-play and bondage.
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Do you want to live life without love. Richmond Virginia woman Naked teen nipples dick Trade adult hookups mature of wife or GF? This ain't no Burger King You hit the on the head! They analyzed the genomes of humans and closely related primates and discovered more than regulatory regions -- sequences in the genome responsible for controlling genes -- that chimpanzees and other mammals have, but humans do not. In other words, they are making a list of DNA that has been lost from the human genome during millions of years of evolution. Results from their study are published in the journal Nature.
Think of it like light bulbs and their switches, where the light bulbs are genes and the switches are these controlling DNA sequences. If there's no bulb, the switch can't turn the light on. Now imagine there's one bulb and five switches to turn it on at different times in different places. If you take one of the switches away, the bulb still works in the four other contexts, but not in the fifth. This study looks at two particular switches. Bejerano and colleagues took the switch information from a chimpanzee's genome and essentially "hooked it up" to a reporter gene, a gene whose effects scientists can track as an organism develops.
They injected the reporter gene in a mouse egg to see what the switch would do. They found that in one case, a switch that had been lost in humans normally turns on an androgen receptor at the sites where sensory whiskers develop on the face and spines develop on the penis. Mice and many other animals have both of these characteristics, and humans do not. Chimpanzees do have small sensory whiskers, not as externally obvious as in cats or mice, but we don't have them at all. Humans lack a switch in the genome that would "turn on" penile spines and sensory whiskers.
But our primate relatives, such as chimpanzees, have the switch, and that's why they differ from us in these two ways. And humans are somewhat exceptional in this regard -- a lot of male primates have bumpy penises; mice, which are rodents, have them, too. The basic idea of natural selection is that over many generations, an animal species loses some traits that are disadvantageous to survival or reproduction or just don't do much, in some casesand develops features that carry benefits. Traits that allow members of a species to have more children will eventually become more widespread, as they are passed on genetically to more and more offspring.
In humans, this process takes place over hundreds of thousands to millions of years.