In 95 percent of cases, Down syndrome results from ________.
A. an extra broken piece of a twenty-first chromosome attaching to another chromosome
B. an error during early prenatal cell duplication
C. a failure of the twenty-first pair of chromosomes to separate during meiosis
D. the inheritance of an extra X chromosome
Answer: C
You might also like to view...
What is the ego’s job?
a. To gather energy toward fulfilling an instinctive need b. To match the wishes of the id with their counterparts in the physical environment c. To learn the do’s and don’ts of society d. To internalize social norms and develop a conscience
Axons from the temporal halves of the retinas cross over to the opposite side of the brain at the optic chiasm.
Answer the following statement true (T) or false (F)
David attends a large state college where 75% of the students are from that state and less than 1% are from California. However, his classmates assume that he is from California because he is tan, has blonde hair, and loves to surf. His classmates' assumption about his state of origin is likely the result of the
A. affect heuristic. B. availability heuristic. C. representativeness heuristic. D. recognition heuristic.
Fuyoko has just begun her adolescent growth spurt. She should expect to grow approximately how many inches per year?
A) 4.5 B) 3.5 C) 2.5 D) 1.5