Question 9 The diploid number of chromosomes in the cell of a domesticated dog is 78. Which of the following options includes the correct number of chromosomes in a cell after each cellular process (G2
checkpoint, meiosis, and fertilization, respectively)?

The result is 39 chromosomes at the poles of the cell. The chromosome number is reduced from 2n (diploid) to n (haploid). Then the cell will undergo meiosis II, where the cell will divide, producing 4 haploid daughter cells with half the number of chromosomes of the parent cell.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: