Risk indexes. Definition: Categories of risk used to calculate fundamental beta, including (1) market variability, (2) earnings variability, (3) low valuation, (4) immaturity and smallness, (5) growth orientation, and (6) financial risk.
(See figure below, where meiosis I begins with a diploid (2 n = 4) cell and ends with two haploid (n = 2) cells.) In humans (2 n = 46), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I (n = 23). Prophase I.
Half the chromosomes go to one end of the cell, and the other half go to the other end, at which point the cell splits in two. According to HowStuffWorks, human beings have 46 chromosomes or 23 pairs of chromosomes. During meiosis, which is similar to mitosis but occurs in sex cells, each new cell contains only 23 chromosomes.