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 489 TABLE 8. RELATIONS BETWEEN LEAST AVERAGE COST AND THE MARGINAL COST OF THE SAME INTERVAL Output by Total Average Marginal intuer v f intervals1 cost cost cost 7 $182.05408 $26.00773 8 200.57477 25.07185 $18.52069 Difference in Average Costs: $26.00773-$25.07185=$0.93588.