Final answer:
The statement 'It occurs during anaphase II of meiosis' is not true regarding crossover since crossover, which increases genetic diversity by exchanging genetic material between non-sister chromatids of homologous chromosomes, actually occurs during prophase I of meiosis. Option d is the correct answer.
Step-by-step explanation:
The question pertains to the concept of crossover which is an important event during meiosis, a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell. The correct answer to the question 'Which of the following is not true in regard to crossover?' is d) It occurs during anaphase II of meiosis.
Crossover, also known as recombination, indeed occurs during prophase I of meiosis. This is the stage where homologous chromosomes pair up and exchange segments of their genetic material. Through this exchange between non-sister chromatids of homologous chromosomes, crossover enhances genetic diversity among the resulting gametes by creating unique combinations of alleles, which contribute to genetic variation in offspring.
In contrast, anaphase II of meiosis is the phase where the sister chromatids, now individual chromosomes, are separated and pulled to opposite poles of the cell. Crossing over does not occur at this stage. Thus, the statement d) 'It occurs during anaphase II of meiosis' is incorrect, making it the answer to the student's question.