*EVIDENCE FOR EVOLUTION - Evolution Makes Testable Predictions.* In the 1950's when it was discovered that humans had 23 pairs of chromosomes (one from each parent), whereas the other great apes, chimpanzees, gorillas and orangutans had 24 pairs, creationists were ecstatic, thinking they finally had evidence to counter common ancestry.
[Chromosomes are packages of DNA that form during mitosis and meiosis.There are two sets, one inherited from each parent. Other Great Apes have 48 chromosomes (24 pairs) (1n=24, 2n=48) whereas humans have 46 chromosomes (23 pairs) (1n=23, 2n=46)]
Evolution made a testable prediction; That somewhere in the human genome we should find evidence of cromosomal fusion. In other words, we should be able to find a human chromosome with the remnants of extra telomeres and centomeres.
Since the loss of all the genes
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It was reasoned that IF two chromosomes had fused, evidence for such an event would be found in a chromosome with two centomeres and teleomeres where they did not belong. That is exactly what was found in human chromosome 2 (chromosomes are numbered by length). It was subsequently discovered that chimpanzee chromosomes 12 and 13 (for comparative purposes designated as 2A and 2B or 2p and 2q) contained the same genes as human chromosome 2 and if placed end to end the positions of those genes matched those of the human chromosome. Those chromosomes in the other apes also lined up in a similar fashion. The fusion event has been confirmed. In just the last few years science has gained largely complete genomes of two other human species, those of Neanderthal and Denisovans. We see that same chromosome fusion in their genomes as well, indication that the fusion event took place in a common ancestor.
The greatest test of ANY scientific theory is in its usefulness as a predictive tool. In this case, as with others, the Theory of Evolution has performed
Verification of this is, “ Scientists had long incorrectly believed that human cells contained forty-eight chromosomes. They struggled to get an accurate count because chromosomes clumped together. In 1953, however, a geneticist in Texas accurately calculated the number of chromosomes in a human cell after mixing a liquid with a HeLa cell...As a result of the discovery in Texas, two other geneticists… discovered that the normal human cell has 46 chromosomes”(Kappel, 2011).Well, based on the text evidence it’s obvious that no one else's genes had been mapped fully since everyone before the guy in texas had been getting the wrong number of chromosomes
This discovery will totally lead to new roads to understanding the evolution of humans and also
Bryan Sykes book, The Seven Daughters of Eve, presents a scientific theory that traces the history of the world through the use of human genetics. He uses this idea to discover an astonishing connection between a handful of women living tens of thousands of years ago, with every person who has existed since. The book introduces the concept of human mitochondrial genetics in order to carefully explain the precise principles of genetics and human evolution. He does so by analyzing ancient DNA to find a genetic link between modern humans with our prehistoric ancestors. By proceeding with this notion, Sykes opens up many forms of thought to explore, both scientifically and personally.
Why Evolution is True: Book Critique 1 In his book, Why Evolution is True, Jerry A. Coyne discusses the many forms of evidence that proves the Theory of Evolution. He discusses what evolution is and debunks many different ideas that people commonly have about evolution. Coyne also explains through humans, animals, and plants how evolution affects life today. Throughout the whole book, he compares and contrasts evolution with creationism and intelligent design.
My 4th Great Grandmother, Le-tsi-Li, who took the English name of Rachel, was born in Georgia during the turmoil of the Indian Removal Act. I cannot begin to imagine what it must have been like for her and her family. The terror of leaving your home, possibly at gunpoint, and marching to some unknown land. The terror and emotion of this experience is unquantifiable. Following her arrival in Oklahoma my Great Grandmother married twice and had several children.
Researchers have taken the Y-chromosome of higher primates including humans, and great apes (orangutans, chimpanzees, bonobos, gorillas) and ran analysis research. They have discovered that the X and Y chromosomes recombine only at the pseudo autosomal region (PAR), which is located at the tip of one arm of X and Y chromosome respectively (Wimmer et al., 2005). They have also discovered that due to lack of recombination the Y-chromosome goes through, there is a specific point in the gene where mutations accumulate (MSY) in almost all primates (Wimmer et al., 2005).
Throughout history, there has been a major debate on the theory of evolution. Is it true? The term evolution has been defined many ways, and for the purpose of this paper, I will use the fourth definition from the Merriam-Webster dictionary. “Evolution is the descent with modification from preexisting species: cumulative inherited change in a population of organisms through time leading to the appearance of new forms: the process by which new species or populations of living things develop from preexisting forms through successive generations.” (Merriam-Webster, 2017) What does this mean and how could it possibly be true? In this paper, I will explain the different ideas
So I found myself missed in with others chromatin inside of a nucleus, Time went by and I started to become friends and we started to mix with purple and yellow chromosomes forming a pair, with the other chromatin. Until Centriole from different sides of the nucleus, using their microtubule they split use apart by hooking on to the centromere, after that two chromosomes with 2 chromatids where in two different nuclei, then the cells started to divide into two at first forming haploid daughter cells 1 and 2 our nucleus disbanded, then the Centriole came were back doing the same thing as before we were split up more, this time each chromosomes was with a chromatid and the nucleus reformed, then the cell divide again making haploid daughter cells 3 and 4, no on had a choice in who they wanted to stay with it was all independent there was no way of knowing how we would be split up.
Over the past few decades, it has been established that Pan Troglodytes, better known as the Chimpanzee, and Homo Sapiens share between ninety-eight and ninety-nine percent of the same DNA, making chimps the closest living relative of modern Homo Sapiens. In fact, chimpanzees may even share more DNA with humans than they do with gorillas. It was Mary Claire King, who in 1975 compared the DNA of humans and chimps, proving that the two species were closer relatives than anyone had previously imagined. But beside the fact that chimpanzees and humans share a remarkable amount of DNA, there are many other studies that prove just how ‘human’ chimps are.
The purpose of Martin and Dawson’s presentation was to inform students about the evolutionary process and to share how evolution works through the process of natural selection. The presentation was also to inform students about how the view of the evolutionary process has changed.
They conducted a study on accelerated base pair changes, non-coding sequences and changes in amino acids of the macaque species and found that deletions of deleterious or extraneous genetic material occurred in Homo that did not occur in other primates and early hominids. Their research finds that 37,251 sequences that are present in ancient primates were deleted from the human genome. Such deletions are conserved in existing primates and could have therefore been instrumental to the subsequent evolution of genotypic and phenotypic traits that are specific to humans. McLean et al. (2011) also points out that such deletions and alterations could have had regulatory utility since they increased the viability of subsequent emergent species without having an undesirable
Development in science field allowed us to achieve a lot of things. One of the most popular science field is genetics and knowledge in genetics has significantly increased, “Compared with the first sequencing effort in 1997, today’s state of the art involves the generation of more than 200 million times more data”, (Hawks, 2013). This remarkable development in science field has a huge impact on archaeological findings too, especially so in helping archaeologists understand human evolution. Although modern genetic research has allowed us to better fully understand human evolution, it has yet
Take, for example, the recent discovery of shoulder blades belonging to two early human Australopithecus species [https://en.wikipedia.org/wiki/Australopithecus], which researchers believe provide us with further evidence that humans and apes do indeed share an ape-like ancestor.
We have studied for years the theory of evolution and the answer is hidden in the future. That human is changing every day as we grow older and our DNA is also being passed down to the next generation. This is going to explain when genes are hidden and not use what the transformation and mutation of human cells will bring in the future. Millions of years, we have seen Neanderthal dinosaur’s fossils, the relations between chimpanzees and humans. The only thing left to see is the creation of a new species of human. Then we as an intelligent species of humans can understand that all was created from a single
Within the nucleus, chromosomes containing genetic information form. Each chromosome contains strands of DNA. Shorter sections of the DNA are called genes. Humans have 46 chromosomes or 23 pairs, which are used to create a child from the parent’s chromosomes. 23 from the mother and 23 from the father are shared. The chromosomes occur in pairs, which have the same shape and size, though they will vary from the other chromosomes attained. Within each pair, one from the mother and the other from the father. The chromosomes carry genes, which cater for a particular feature; therefore, we have two genes fore every single characteristic within our body. If both of the genes attained are the same, then it is considered a dominant gene. Whereas, if