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  3. Study Set
    Human Biology Study Set 6
  4. Exam
    Exam 20: Chromosomes and Human Genetics
  5. Question
    X Chromosome Inactivation Occurs ____
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X Chromosome Inactivation Occurs ____

Question 19

Question 19

Multiple Choice

X chromosome inactivation occurs ____.


A) fertilization but before cell division begins
B) just after cleavage begins
C) at implantation
D) gestational week 1
E) just after birth

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