Question

Which of the following best describes what happens during a crossover event

a. tetrads change orientation as a lineup along the center of the cell
b. chromatids of homologous chromosomes exchange corresponding segments
c. X and Y sex chromosomes overlap and combine together during metaphase
d. spindle fibers overlap and attach to the wrong chromosomes during anaphase

Answer 1

tetrads change orientation as a lineup along the center of the cell