Errol's father carries two recessive genes for sickle-cell anemia, and Errol's mother carries two normal dominant genes. Therefore, Errol has inherited _______________ from his parents

Which of the following features of a social support appears to be most critical in providing a buffering effect in the face of stress?

a. size b. frequency of contact c. perception of quality of support d. perception of the status of its members

The production of two-word speech does not follow any rules

Indicate whether the statement is true or false