<span>Chromosomes are attached to the spindle fibers during metaphase. The spindle fibers are structures important for equal division of chromosomes during cell division. They form in the metaphase when homologous pairs of chromosomes are lined up along the centre of the cell. At this phase, chromosomes are attached to the spindle fibers.
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<span>Two organisms "supposed to be"of the same species, and both masculine, cannot breed together, so they can't be of the same species.<span>If an organism "A" can breed with two other organisms "B" and "C", it means that "A", "B" and "C" all (appear to) belong to a single species, but not necessarily "B" and "C" must be capable of breed together, meaning that "B" and "C" belong to different species.</span></span>
The best vitamin to recommend in the scenario given above is VITAMIN B3, WHICH IS ALSO KNOWN AS RIBOFLAVIN.
John is suffering from ariboflavinosis, which is a deficiency disease that is due to inadequate intake of riboflavin and the disease is characterized by sores on the mouth.
The correct answer of the given question above would be Meiosis-Prophase I. When you are looking at a cell through a microscope and see that a tetrad has formed, the phase of meiosis that the cell is in is in the Prophase I. This is when homologous chromosomes pair with one another to form tetrads. Crossing over occurs. Hope this answer helps.
