To become active, Cdk1 must
a. bind cyclin.
b. bind cyclin and be phosphorylated on tyrosine 15 and threonines 14 and 161.
c. bind cyclin and be phosphorylated on tyrosine 15, and be dephosphorylated on threonines 14 and 161.
d. bind cyclin and be phosphorylated on threonine 161, and be dephosphorylated on threonine 14 and tyrosine 15.
Ans: b. bind cyclin and be phosphorylated on tyrosine 15 and threonines 14 and 161.
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Recombination of alleles on nonsister chromatids occurs during
a. anaphase I. b. meiosis II. c. telophase II. d. crossing over.
The 7 characters studied by Mendel are examples of single gene traits. They are called this because:
A: there is only a single genotype for all individuals. B: distinct phenotypes are produced by variant alleles of a single gene. C: there always is 1 dominant allele and 1 recessive allele for a given character. D: all of the above
In a mapping experiment with three linked genes, which phenotype should occur most often in the F2 offspring?
A. Parental phenotypes B. Phenotypes of individuals with single crossover events C. Phenotypes of individuals with double crossover events D. All of the phenotypes should occur equally in the F2 generation
A ____ is required to transfer genes from one organism to another
a. vector b. reverse transcriptase c. transport molecule d. genetic probe e. PCR device