Hospital Data Shows That Human Infants Born with an Intermediate

Essay

Hospital data shows that human infants born with an intermediate birth weight have a better chance of survival than those that weigh much less or much more than usual. Larger than normal babies may have a difficult delivery, while smaller than normal babies may not be fully developed. What type of selection is occurring? Is the variability in birth weight in human populations increasing or decreasing? Explain what the normal population distribution would look like on a scale of 1 - 20. Explain what the distribution would look like after many generations and indicate the phenotype selected.