During which meiotic phase does crossing over occur?
A) anaphase I of meiosis I
B) anaphase II of meiosis II
C) prophase I of meiosis I
D) prophase II of meiosis II
C
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How does vernalization alter the genetic material of plants? In other words, how does the genetic material of some plants change after exposure to the winter months? Select all correct choices
A. through chromatin remodeling B. through mutations in certain genes C. through DNA methylation D. through RNAi
The electrical difference across a neuronal membrane is measured in
A. millivolts. B. milliamperes. C. milliwatts. D. joules. E. newtons.
Which of the following is NOT a characteristic of bacterial chromosomes?
A. they are single stranded B. they are around 10? smaller than eukaryotic chromosomes C. they contain gene coding regions and regulatory regions D. they have 10-base-pair regions that control DNA folding E. they have only one origin of replication
What is the correct sequence of the reagents in the Gram stain technique?
a. safranin, crystal violet, alcohol, iodine b. alcohol, iodine, crystal violet, safranin c. crystal violet, iodine, alcohol, safranin d. iodine, alcohol, safranin, crystal violet