A number of recessive genes, called ___________ genes, are located only on the X chromosome

Which of the following statements is true regarding the development of the sex organs in a baby?

a. The first sex organs appear far earlier in girls than in boys, since the organs do not require extra tissue for their formation. b. The first sex organs do not develop until the first 12 weeks of pregnancy are over, which is why pregnant parents cannot find out the gender of the baby until this point. c. The first sex organs appear far earlier in boys than in girls, since the organs are external as opposed to internal. d. The first sex organs, which are the gonads, are identical in male and female fetuses for the first month or pregnancy.

Ten-year-old Steve runs over to Keesha on the playground and tells her that she has "cooties."

Keesha chases after him and yells that he has "cooties." This is an example of ____________________ in middle childhood play. a. gender segregation b. bullying c. boundary violations d. dominance hierarchies