Moreover, due to the shuffling of genes in a process called crossing-over, a person gets a fairly complex collection of genes from all of their grandparents. However, genes are sometimes gets broken - defective. So, genetics has shown that a healthy gene derived from the father, can cover the negative effect of the defective gene, obtained from the mother, and - on the contrary. So it became clear observation of Charles Darwin on the increased vitality of hybrids of different a****l species.However, the persistence of the Métis is not the main advantage of sexual reproduction. Much more important is the possibility of a combination of several positive mutations. This phenomenon is most evident in bacteria. While the bacteria multiply by simple division, there are some kinds of sex as exchange of genetic material through a dedicated hose (pilus), bacteria which are connected to each other as during refueling aircraft in the air. In this way the bacteria communicate with each other. ”He tied the shoelaces saying the little ditty about the Indian, “Build a tee pee, come inside, close it tight so we can hide. Over the mountain and around we go, here’s my arrow and here’s my bow.”“Do you always say that?” Sid asked staring at Sean.“No,” Sean answered.Shaking his head, Sid said, “You better tie the bows. You wouldn’t want to trip on your laces when you’re walking out there.”“That’s a good idea. There’s not much chance of winning if I happen to break an arm or a leg,” Sean said. He tied the laces into a knot.Sid said, “There’s no chance of you winning no matter what you do.”Sean stood up and did a muscle man pose with both arms bent out to the sides and leaning over a bit. He said, “I am ready.”“You’re dead,” Sid said thinking that Sean looked a lot like a plucked chicken strutting around like that.Sean walked out to the gym where a huge crowd was gathered. All of the seniors and half of the juniors were there to watch the contest. He looked around at the people.
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