Annual "smoking attributable mortality" in the U.S. is estimated at

During meiosis, at times chromosomes sometimes fail to divide properly and as a result the person may have 45 or 47 chromosomes (or even, in rare cases, 48 or 49). Which of the following best describes this phenomenon?

a. chromosomal disorder b. genetic misprinting c. mitosis error d. gene displacement

In nearly every developed country, at all levels of education, girls now excel over boys in __________

a) overall academic achievement b) STEM-courses completed c) graduation rates d) number of college degrees awarded