Analyze both the genetic and environmental factors that lead to variation in height among children.
What will be an ideal response?
The ideal answer should include:
1. Genetics: About 90 percent of variability in height is due to genetic variation.
2. Ethnic and racial background: African American boys and girls grow faster on average than white children, who in turn grow taller than children of Hispanic or Asian origin.
3. Environment: Nutritional shortages lead to differences in the heights of parents who immigrate from a developing nation to the United States and their U.S.-born children.
4. Secular trend in physical growth: Due to improved health and nutrition, each generation is taller on average than the preceding one in industrialized countries.
You might also like to view...
One of the troubling side effects associated with some antipsychotic drugs is
a. numbness in the extremities. b. tinnitus. c. blurred vision. d. extreme weight gain.
Cluster sampling is different from stratified random sampling in that some subgroups are omitted from a sample using cluster sampling, whereas a random sample of individuals in each subgroup is included in a sample using stratified sampling.
Answer the following statement true (T) or false (F)
The typical response to the loss of a loved one is __________
A) resilience B) prolonged distress C) permanently impaired mental health D) permanently impaired physical health
Which of the following persons are likely to have the highest concordance rate for obesity?
a. DZ twins b. Children and their adoptive parents c. MZ twins reared together d. Siblings that are at least 3 years apart