1) mash a few strawberries and put in beaker containing solution of detergent and salt- mix well. DETERGENT will break down cell membranes to relase DNA. SALT will make DNA stick together.
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How can DNA be extracted from a fruit?
2)filter mixture to get froth and big, insoluble bits of cell out 3)gently add some iced cold alcohol to filtered mixture
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How can DNA be extracted from a fruit?
4)DNA will start to come out of solution as it's not soluble in cold alcohol. Will appear as stringy white precipitate (solid) and can be carefully fished out with glass rod
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What is DNA?
a polymer made up of two strands coiled to form a double helix. starands linked by a series of complimetary base pairs joined together by weak hydrogen bonds. 4 BASE PAIRS- Adenine, Thymine, Cytosine, Guanine. A and T. C and G.
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What is DNA?
nucleotides that consist of a sugar and phosphate group with one of the four different bases attached to the sugar
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Sex offspring?
there are 23 matched pairs of chrmosomes in every human body cell. 23rd pair is ** and XY. mALES HAVE xy. Females have **. equal chance of boy or girl. All eggs have X chromosome but sperm can have X or Y. Sex determined by sperms chromosome
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Other cards in this set
Card 2
Front
How can DNA be extracted from a fruit?
Back
2)filter mixture to get froth and big, insoluble bits of cell out 3)gently add some iced cold alcohol to filtered mixture
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