How would genetic variation be affected

How would genetic variation be affected if during meiosis I maternal chromosomes always lined up together on one side of the metaphase plate and paternal chromosomes always lined up on the other side (ignoring the effects of crossing over)?

a. Gametes would contain either maternal chromosomes only or paternal chromosomes only.
b. Gametes would contain maternal chromosomes only.
c. Gametes would contain different combinations of maternal and paternal chromosomes.
d. Gametes would contain paternal chromosomes only.

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