BIOL 2153 : EXAM 2 GENETICS
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Chapter 6 dna (part 1) (homework problems: 1,2,4,7-11,13,15,18,19,22,27) experiment questions on exam! Hershey and chase experiment: 1952 alfred hershey and martha chase provide convincing evidence that dna is genetic material. Blender experiment using t2 bacteriophage and bacteria: bacteriophage = virus (neither living or dead, bacteriophage = literally bacteria eater, radioactive labels 32p for dna and 35s for protein. [2] phage injects its genes into the host cell. [3] phage dna replicates; new phage proteins are made. Clicker: by convention, which sequence reflects the dna molecule shown in the image: gact, tcag written from 5" to 3" direction, 3" has an open hydroxyl group. Nucleotides differ only in bases: pyrimidines = one ring, thymine, cytosine, purines = two rings, adenine, guanine. Question like this on test: 80%, 60%, 40%, 20%, 10, a pairs with t 40% = a 40% =t, 20% left over to split between c and g; 10% each.
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Females inherit X-linked traits from their maternal parent only. | ||
Females can inherit a gene for an X-linked trait from either parent. | ||
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Males can inherit a gene for an X-linked trait from either parent but normally inherit it from their fathers. |