Gene conversion can be observed in fungi by identifying aberrant ratios in the ascus. Which of the following represent possible aberrant ratios caused when there is no mismatch repair of base-pair mistakes in the heteroduplex region?
A) 4:4
B) 3:1:1:3
C) 5:3
D) 6:2
E) 3:3:2
B
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The force that blood exerts on artery walls is termed _____ pressure.
A. venous B. gravitational C. blood D. osmotic E. pulmonary
When F+ conjugation occurs successfully, only one copy of the F plasmid single-stranded DNA is transferred. What else must minimally occur?
A) circularization of the recipient's new DNA B) circularization plus replication of the new recipient DNA C) stopping the rolling circle replication after one copy length, circularization, and replication D) continuation of rolling circle replication in the donor cell and replication in the recipient cell E) rolling circle replication in the recipient cell
RNA nucleotides are linked by the enzyme _____________.
Fill in the blank(s) with the appropriate word(s).
Which lineage includes the tuatara as one of its only two living members?
a. Squamata b. Testudines c. Sphenodontia d. Amphibia