When this happens near land, we see the earth above the two meeting plates rise, forming spectacular mountain ranges. A parallel oceanic trench typically forms just off the shore, as one plate descends deep into the Earthâs core. These convergent boundaries commonly cause volcanoes to form, as old crust melts.
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells â sperm in males, eggs in females. 1  During meiosis one cell divides twice to form four daughter cells. 2  These four daughter cells only have half the number of chromosomes of the parent cell â they are haploid. 3  Meiosis produces our sex cells or gametes (eggs in females and sperm in males).
How does the separation of homologous chromosomes take place? During what stage does it happen? What are the differences between chromosomes, chromatids and chromatin? If an organism's diploid chromosome number is 18, how many different possible combinations of homologous chromosomes lining up during meiosis ...