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BIO 340 Final Exam Questions and Complete Solutions Graded A+
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BIO 340 Final Exam Questions and Complete Solutions Graded A+
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BIO 340 FinalExam Questions
and Complete
Solutions Graded
A+
Denning [Date] [Course title]
, directional natural selection - Correct Ans: Frequency of allele = freq(homo) + ½ freq(het)
What are the possible genotypes for a cross between two people that are heterozygous for the same
trait (T) and what is the probability of each? - Correct Ans: TT = .25 Tt = .5 tt = .25
if two people who are both carriers for a genetically inherited recessive disease decide to become
parents, what will be the odds that their children will also be carriers? - Correct Ans: 0.5
If two parents are heterozygous for a genetically inherited dominant trait, what is the probability that
they will have a child together who has this trait in his or her phenotype? - Correct Ans: .75
In a dihybrid cross, SsYy x SsYy, what fraction of the offspring will be homozygous for both traits? -
Correct Ans: 1/4
Which statements about inheritance of rare traits in pedigrees are true? - Correct Ans: It is assumed
that unrelated individuals who join an affected family do not carry the trait
A double stranded DNA molecule contains 20% guanine, what percentage of adenine does it contain? -
Correct Ans: 30%
In which cellular compartment is the poly-A tail added to mRNA? - Correct Ans: Nucleus
Which of the following is a characteristic of a rho-dependent terminator? - Correct Ans: termination
requires ATP
A peptide bond forms between the positively charged ______ of one amino acid and the negatively
charged _______ of another. - Correct Ans: Amino Group; Carboxyl group
Single nucleotides are added to a growing nucleotide chain during DNA synthesis. A covalent
____________ bond is formed between the ____ carbon on __________ of the nucleotide at the end of
a DNA chain and _________ on the_____ carbon of an incoming nucleotide. - Correct Ans:
Phosphodiester; 3' ; Deoxyribose ; Phosphate ; 5'
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