Which of the following is an example of an incomplete dominant inheritance?
a. Down syndrome
b. Fragile X
c. sickle-cell anemia
d. HIV
C. Incomplete dominance occurs when the phenotype is influenced primarily but not exclusively by the dominant gene. One example of incomplete dominance involves the sickle-cell trait that is common among black Africans and their descendants, such as African Americans.
You might also like to view...
In Donders's experiment on decision making, when participants were asked to press a button upon presentation of a light, they were engaged in a
A. sensory memory task. B. simple reaction time task. C. choice reaction time task. D. classical conditioning task.
The differing patterns of impairment associated with Alzheimer's disease dementia and HIV-caused major neurocognitive disorder are primarily attributable to a. the different areas of the brain affected
b. the immune response to the virus in HIV patients. c. psychosocial differences in the lives of the typical patients with each disorder. d. unexplained causes.
Being victimized by a bully is less likely
A) among younger than among older adolescents. B) if the potential victim has at least one good friend. C) in a smaller school. D) if the potential victim learns to avoid social encounters.
The results of the Flanagan and Eccles study on changes in parents' work status and its
effect on their children's transition to junior high demonstrated that a. the transition was more rewarding for those children whose parents had been promoted in their workplace. b. the transition was not affected by the parents' work status. c. the transition was more difficult for those children whose parents were experiencing changes in the workplace. d. girls were affected by changes in parents' work status but boys were not.