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Charles Darwin published The Origin of Species. It explains how the Galapagos Islands each supported its own variety of finch, which were closely related but had slight differences that seemed to have adapted in response to their individual environments.
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Mendel discovers how genetics are passes from the peas to peas.
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nuclei of human white blood cells, which we know today as deoxyribonucleic acid. To find this result he made arrangements for a local surgical clinic to send him pus-saturated bandages, which he planned to wash out before filtering the white blood cells and extracting their various proteins.
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Walter Sutton studied grasshoppers and connected the phenomena of meiosis, segregation, and independent assortment with the chromosomal theory of inheritance. He researched chromosomes, then called inheritance mechanisms.
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Theodor Boveri developed the chromosomal theory of inheritance. It is idea of chromosomal individuality. He sought to provide a comprehensive explanation for the hereditary role and behavior of chromosomes. This theory was similar to Sutton's theory.
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He observed that, of the four chromatids present at the connection sites at diplotene or anaphase of the first meiotic division, two crossed each other and two did not. This tells propose that the chromatids distributed in the four nuclei issued from the second meiotic division had various combinations of maternal and paternal segments of each chromosome.
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Thomas Hunt Morgan used white eye fly and red eye fly. He found interesting points from the experience. Only the male of the flies have red eyes. This represent correlation of a nonsexual trait.
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he became the first person to order the amino acids and obtain a protein sequence. He deduced that if proteins were ordered molecules, then the DNA that makes them must have an order as well.
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Oswald Avery try to find what substance cause transformation. He soon noted that the substance did not seem to be a protein or carbohydrate but rather a nucleic acid, and with further analysis, it was revealed to be DNA.
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Barbara McClintock try to expand concepts of what genes were capable of when she discovered that some genes could be mobile. She studied of chromosome breakage in maize and this led her to discover a chromosome-breaking locus that could change its position within a chromosome.
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conducted a large portion of the research which eventually led to the understanding of the structure of DNA.
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Francis Crick met James Watson and they constructed a model of the double helix shape we now associate with DNA. They speculated that if you split one side of the ladder from the other, each side would become a pattern for a new strand of DNA.
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James Watson also met Crick to construct DNA models
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She used bacteria cells, in order to rupture their walls and release the cytoplasm. The pair performed an experiment which showed that a chain of the repeating bases uracil forced a protein chain made of one repeating amino acid, phenylalanine. This was a breakthrough experiment which proved that the code could be broken.
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He initially began working on sequencing RNA, as it was smaller, but these techniques were soon applicable to DNA and eventually became the dideoxy method used in sequencing reactions today.
