In humans, XO individuals are females with Turner syndrome and XXY individuals are males with Klinefelter syndrome. Which of the following events cannot give rise to a Klinefelter male?
A) nondisjunction at meiosis I in the mother
B) nondisjunction at meiosis II in the mother
C) nondisjunction at meiosis I in the father
D) nondisjunction at meiosis II in the father
E) All of the choices could give rise to a Klinefelter male.
D) nondisjunction at meiosis II in the father
You might also like to view...
WHAT IS ULTIMATE SOURCE OF ALL DIVERSITY?
A. NATRUAL SELECTION B. SEXUAL RECOMBINATION C. MEIOSIS D. MUTATION
Which is incorrect about meiosis?
A. Sister chromatids separate in anaphase I. B. Meiosis I results in 2 haploid cells. C. Meiosis II is like mitosis. D. Chromosome replication only occurs in interphase I. E. Crossing over occurs in prophase I.
Which muscle component is smallest?
A) myofibril B) myosin filament C) sarcomere D) muscle fiber
Members of the order Hemiptera (true bugs) go through postembryonic development called incomplete metamorphosis. What are the stages of this process?
a. several instars of often wormlike larvae, followed by a stage where they are a sessile pupa, and then ending in an adult stage that is very different from the larval stages b. a series of nymph instars that lack functional wings, ending with an adult instar with functional wings c. a single, wingless nymph instar followed by several winged adult instars d. a series of young instars that become more and more like an adult, ending with a wingless adult instar