Which of the following occurs during the first meiotic prophase?

Question

A. Sister chromatids separate

B. Homologous chromosomes undergo exchange

C. Sister chromatids are replicated

D. DNA content becomes half of that in mitotic phase.

E. Homologous chromosomes separate 

Answer 1

During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent. Chromosomal condensation allows these to be viewed in the microscope

In anaphase II, the sister chromatids separate and are pulled towards opposite poles of the cell. In telophase II, nuclear membranes form around each set of chromosomes, and the chromosomes decondense

Answer 2

B. Crossing Over happens in Prophase I - This is when Homologous Chromosomes exchange information.