Main articles: Growth hormone 1 and Growth hormone 2. Genes for human growth hormone, known as growth hormone 1 (somatotropin) and growth hormone 2, are localized in the q22-24 region of chromosome 17 and are closely related to human chorionic somatomammotropin (also known as placental lactogen) genes.
The U-shape of the marginal cost curve is directly attributable to increasing, then decreasing marginal returns (and the law of diminishing marginal returns). As marginal product (and marginal returns) increases for relatively small output quantities, marginal cost declines.
CHARACTERISTICS OF THE MARGINAL COST CURVE 473 pounds, 6500 pounds become interval number 13; 7000 pounds, interval number 14; etc. But in Table 44, average costs are given per 100 pounds output even though output is again shown as 6500, 7000, etc. pounds.