Gel electrophoresis separates DNA fragments on the basis of differences in their A:C ratio.
a. true
b. false
a. true
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A trait with variable expressivity is one that:
A. is only expressed in homozygous recessive individuals. B. is only expressed in homozygous dominant individuals. C. is only expressed in some of the individuals that have the genotype for that trait. D. is expressed in only some offspring of affected individuals. E. can be expressed differently in different individuals that have the genotype for that trait.
Which statement about amino acids is false?
A) Every amino acid contains a carboxyl group. B) The side chain or R group is the same in each amino acid. C) In a polypeptide, amino acids are joined by peptide bonds. D) One end of a polypeptide, the N terminus, contains a free amino group.
A karyotype reveals that an individual is XYY. Based on your knowledge of human genetics, you correctly conclude
that this individual has ____, and is a phenotypically _____. a. Turner syndrome; sterile female b. Turner syndrome; fertile female c. Klinefelter syndrome; sterile male d. Klinefelter syndrome; fertile male e. XXY karyotype; fertile male
If a mutation were to occur in lambda phage that made it unable to express integrase, what would happen?
a. It would be stuck in the lysogenic cycle. b. It would be unable to form circular DNA once it entered the host. c. It would be unable to inject its DNA into the host. d. It would be unable to recombine with the bacterial chromosome.