BIO SCI 97 Lecture Notes - Null Hypothesis, G1 Phase, Apoptosis
21 Jan 2014
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Document Summary
Study of dna modification that affects gene expression: histone modification: Acetylation: removes (+) charge increase gene transcription. Phosphorylation: adding negative charge dna more accessible: methylation of cytosine residues on dna blocks transcription. Reciprocal cross: 2 different crosses are done with the same trait. Back cross: offspring from f1 is crossed with its parent. Parent: aa x aa a: tall ; a: short. F2: 1:2:1(aa: aa: aa) 3 tall and 1 short. From the punnett square, describe the phenotype of the offspring. True or false: in general for pedigrees of the recessive allele, those who are affected have parents that are affected. True or false: for both the dominant and recessive allele pedigree, both sexes are affected. Affected have parents that are unaffected heterozygotes (carriers) Offspring are affected when parents are unaffected. Segregation: 2 alleles for a trait separate during meiosis & have equal chance of being in a gamete.
