1. 14.2 – Human Chromosomes

2. 14–2 Human Chromosomes A. Human Genes and Chromosomes
B. Sex-Linked Genes
1. Colorblindness
2. Hemophilia
3. Duchenne Muscular Dystrophy
C. X-Chromosome Inactivation
D. Chromosomal Disorders
1. Down Syndrome
2. Sex Chromosome Disorders

3. Nondisjunction Homologous chromosomes fail to separate Meiosis I:
Meiosis II
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4. Colorblindness Go to Section: Father (normal vision) Normal vision
Male
Female
Daughter
(normal vision)
Son
(normal vision)
Mother (carrier)
Daughter
(carrier)
Son
(colorblind)
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5. Colorblindness Go to Section: Father (normal vision) Normal vision
Male
Female
Daughter
(normal vision)
Son
(normal vision)
Mother (carrier)
Daughter
(carrier)
Son
(colorblind)
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6. Nondisjunction Homologous chromosomes fail to separate Meiosis I:
Meiosis II
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7. Nondisjunction Homologous chromosomes fail to separate Meiosis I:
Meiosis II
Go to Section: