Question

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13 Chapter 8: Cellular Reproduction: Cells from Cells Table 8.1 on page 140 of your textbook displays information regarding sex chromosome abnormalities in humans. Why does the XYY situation have to be the result of nondisjunction in the sperm formation? Sex Chromosomes XXY Syndrome Symptoms XYY XXX ΧΟ

Answer 1

1. XXY = Klinefelter syndrome
Symptoms: Reduced muscle mass, delayed puberty, reduced facial hair, and infertility

2. XYY = Jacob's syndrome
Symptoms: Mild symptoms, increased height, cystic acne, explosive temper, and hyperactivity (normal fertility)

3. XXX = Triple X syndrome
Symptoms: Learning disability, flaccid muscles, and delayed development

4. XO = Turner syndrome
Symptoms: Delayed puberty, infertility, learning disabilities, and short stature