Adolescent sex workers are a pervasive problem, particularly in __________

Which of the following statements about sex chromosomes is true?

A) The Y chromosome is large and long, and the X chromosome carries most of the genetic material. B) Both boys and girls are born with several pairs of X and Y chromosomes. C) When gametes form in females, the X and Y chromosomes separate into different cells. D) The sex of a new organism is determined by whether an X-bearing or a Y-bearing sperm fertilizes the ovum.

A simple consideration of the number of people married and the number divorced in a given year typically leads to the conclusion that about ____ of all marriages end in divorce; however the actual percentage is about ____

a. half; 55% b. half; 40% c. half; 30% d. two-thirds, 50%