For the following questions, select the one best answer. Please mark your answers on the batch card. Show any work on the exam.
All questions have the same value.
The stage of prophase I in which homologous chromosomes are held together only by chiasmata and are fully condensed is called A. diakinesis B. metaphase II C. pachytene D. zygotene E. leptotene 2. A 15 year female is short in stature and fails to menstruate. Staining of cells from her buccal mucosa indicate a single Barr body, while most of her white blood cells have no Barr bodies. One explanation for the finding in question 3 is A. chromosome loss in an XX zygote during an early mitotic event. B. fertilization of a normal egg by an XY bearing sperm C. fertilization of a normal egg by an XX bearing sperm D. fertilization of an egg nullisomic for X by a normal sperm.