Question

________ is the best stage to observe the shape, size, and number of chromosomes

• A. interphase
• B. metaphase
• C. prophase
• D. Telophase

Answer 1

Answer:

B. metaphase

• Metaphase is the best time to observe chromosome shape, size, and number.

• At the metaphase plate, a region in the center of the cell, the replicated chromosomes align for mitosis or meiosis.

• The chromosomes at metaphase are highly condensed and tightly packed, making it easy to observe their structures.

• They are also aligned in one plane, making it convenient to compare and analyze.

• Chromosomes are now clearly visible under a microscope, appearing as rod-like structures, and their number, shape, and size can be analyzed.

• In contrast, during interphase, the chromosomes are in a more extended and diffuse state, making it difficult to observe individual chromosomes.

• It is less possible to examine chromosomes’ shape, size, and number precisely during prophase and telophase when they are either condensing or decondensing, respectively.