Answer: A. One sisters cell would have more chromosomes than normal.
The other sisters cell would have fewer chromosomes than normal.
Step-by-step explanation:
If sister chromatids do not split equally during anaphase of mitosis, one sisters cell would have more chromosomes than normal and the other sisters cell would have fewer chromosomes than normal.
Unequal splitting means that sister chromatids do not separate, resulting in both sister chromatids being pulled into the same sisters cell, leaving the other sisters cell without that chromosome altogether.