Atriploid cell contains three sets of homologous chromosomes. if a cell of a diploid species that normally has 42 chromosomes per cell is triploid, this cell would be expected to have which of the following sets of chromosomes? a. 63 chromosomes in 31 1/2 pairs. b. 21 chromosome pairs and 21 unique chromosomes. c. 63 chromosomes, each with 3 sister chromatids. d. 63 chromosomes in 21 sets of 3.

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when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.