Questions: Consider a diploid cell that contains three pairs of chromosomes designated AA, BB, and CC. Each pair includes a maternal and a paternal member (e.g. A^m and A^P.) Part A During meiosis I, assuming no crossing over, what possible chromosome combinations can be present at the metaphase plate at the completion of metaphase I? Select all that apply. A^m A^P, B^p B^m, C^P C^m A^P A^m, B^p B^m, C^p C^m A^m A^p, B^m B^p, C^P C^m A^m A^p, B^m B^p, C^m C^8 A^P A^m, B^m B^P, C^P C^m A^P A^m, B^m B^P, C^m C^8 A^m A^p, B^p B^m, C^m C^P A^P A^m, B^P B^m, C^m C^P

The answer is the seventh one: \( A^{m} A^{p}, B^{p} B^{m}, C^{m} C^{P} \).

Explanation for each option:

1. \( A^{m} A^{P}, B^{p} B^{m}, C^{P} C^{m} \):

   • Incorrect. Each homologous pair should be aligned together, not mixed.

2. \( A^{P} A^{m}, B^{p} B^{m}, C^{p} C^{m} \):

   • Incorrect. Each homologous pair should be aligned together, not mixed.

3. \( A^{m} A^{p}, B^{m} B^{p}, C^{P} C^{m} \):

   • Incorrect. Each homologous pair should be aligned together, not mixed.

4. \( A^{m} A^{p}, B^{m} B^{p}, C^{m} C^{8} \):

   • Incorrect. "C^{8}" is not a valid chromosome designation.

5. \( A^{P} A^{m}, B^{m} B^{P}, C^{P} C^{m} \):

   • Incorrect. Each homologous pair should be aligned together, not mixed.

6. \( A^{P} A^{m}, B^{m} B^{P}, C^{m} C^{8} \):

   • Incorrect. "C^{8}" is not a valid chromosome designation.

7. \( A^{m} A^{p}, B^{p} B^{m}, C^{m} C^{P} \):

   • Correct. This represents a valid combination where each homologous pair is aligned together.

8. \( A^{P} A^{m}, B^{P} B^{m}, C^{m} C^{P} \):

   • Incorrect. Each homologous pair should be aligned together, not mixed.

Summary: The correct possible chromosome combination at the metaphase plate at the completion of metaphase I, assuming no crossing over, is \( A^{m} A^{p}, B^{p} B^{m}, C^{m} C^{P} \).