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Transcript
“Deoxyribonucleic acid: an extremely long macromolecule that is the main component of chromosomes and is the material that transfers genetic characteristics in all life forms, constructed of two nucleotide strands coiled around each other in a ladder like arrangement with the sidepieces composed of alternating phosphate and deoxyribose units and the rungs composed of the perinea and pyrimidine bases adenine, guanine, cytosine, and thymine: the genetic information of DNA is encoded in the sequence of the bases and is transcribed as the strands unwind and replicate.” Basically, DNA contains genetics in all life forms. The genetics in DNA is developed and stored by the different combinations and orders of stored information. DNA transfers genetic information to your cells. Cells divide, and usually copy the DNA exactly how it is. Sometimes if it doesn’t copy correctly, the cell either dies or a mutation occurs. Each single-stranded DNA fragment is made up of four different coding molecules, or base pairs, called nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C) that are linked end to end. Each base on the opposite strand specifically pairs with, or is the complement of, the other: an A always pairs with a T, and a C always pairs with a G. A DNA molecule with the sequence DNA is in the chromosomes. Humans have 2 sets of 23 chromosomes. Parents contribute one complete set each to the child and therefore the child inherits one set from each parent so the child contains DNA from each parent. a + = It all has to do with receiving DNA from both parents. The offspring is a perfect combination of each parent. The dad is fat, the mom is skinny, the offspring is normal. The dad is brown and white, the mom is white so the offspring is a light brown. So basically, in the last slide each flower had a dominant purple gene and recessive white gene. As you can see, there is a 75% chance of a purple flower in the outcome and a 25% chance of a white flower as the outcome. This is the theory of recessive and dominant genes.
