Children born in areas where proper nutrition is not available to them do not always realize their full growth potential.These children have the genes for normal growth of bones.Which of the following statements can best explain this situation?
A)There is a lack of dominance in the alleles for normal bone growth;as a result,the genotype is directly affected.
B)Since nutrition is necessary for proper development and is a part of the environment,it is a clear case of environmental effect on the phenotype.
C)Since nutrition is necessary for proper development and is a part of the environment,it is a clear case of environmental effect on the genotype.
D)There will always be examples that reflect this condition in human populations because of the continuous variation that exists for this characteristic.
E)The children's parents did not obtain the proper nutrients when they were young and thus were not able to pass on the alleles for normal growth and development.

Question

Quizplus · Accepted Answer

Proper nutrition is necessary for the expression of genes that promote normal growth of bones. Without the necessary nutrients, the genotype for normal growth is not able to be fully expressed, resulting in a phenotype that is smaller and less developed than expected. This is a clear example of an environmental effect on the phenotype.

Children Born in Areas Where Proper Nutrition Is Not Available