What Aspect of Chromosome Behavior Most Clearly Accounts for Mendel's

Multiple Choice

What aspect of chromosome behavior most clearly accounts for Mendel's law of segregation?

A) movement of sister chromatids to opposite poles at anaphase II of meiosis
B) movement of homologous chromosomes to opposite poles at anaphase I of meiosis
C) crossing-over between homologous chromosomes during prophase I of meiosis
D) replication of chromosomes prior to meiosis
E) independent alignment of different homologous pairs on the metaphase I spindle