Final answer:
The assertion that chromosomes have no organizational pattern in the nucleus is false. Chromosomes in eukaryotic cells become organized especially during cell division, where homologous chromosomes line up at the metaphase plate due to microtubules. The correct option is b. False.
Step-by-step explanation:
The statement that chromosomes place themselves wherever in the nucleus and that there is no pattern is false. In eukaryotic cells, chromosomes have specific arrangements within the nucleus. During most of the cell cycle, while the cell is not dividing, chromosomes are in the form of chromatin, which is unwound and cannot be easily distinguished. However, during cell division, chromosomes become visible and organized. Specifically, during the metaphase of cell division, homologous chromosomes assemble at the metaphase plate where they are positioned by the microtubules.
Furthermore, during the process of meiosis, which is essential for sexual reproduction and genetic diversity, chromosomes align randomly along the metaphase plate, an event that underlies Mendel's law of independent assortment. This contributes to the genetic diversity of gametes. Distinguishing between chromatin and visible chromosomes is critical for understanding cell function and genetics. The correct option is b. False.