Tommy and his sister Maria have the same parents but they do not look alike. Which of the following factors best explains why they have this genetic variation within their family?
The separation of sister chromatids during telophase I.
The crossing over of genetic information during mitosis.
The independent assortment of genetic information during anaphase I.
The exchange of genetic information as chromosomes line up during metaphase II.
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Tommy and his sister Maria have the same parents but they do not look alike. Which of the following...
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