Bio-Chp 24

• 1.
• Pairs of Homologs
• 1-22 = Autosomes
• 23 = Sex Chromosome

• 2.
• XY= Male
• XX= Female

• 1. genes that determine developement on the sex organs on 23rd chromosome
• 2. genes that have nothing to do with sex found on 23rd chromosome
• 3. genes are said to be sex linked
• 4.

• 1. Duchenne Muscular Dystrophy
• 2. Hemophilia
• 3. Color Blindness
• a. Blue-Green
• b. Red- Yellow

Genotype Phenotype

• X(B)X(B)-------Normal Vision- Female
• X(B)X(b)-------Normal Vision/ Carrier- Female
• X(b)X(b)-------Color Blindness- Female
• X(B)Y----------Normal Vision- Male
• X(b)Y----------Color Blindness- Male

Used to show a pattern of inheritance for a particular trait through a series of generations

• 1. Autosomal Recessive Genetic Disorder
• 2. Autosomal Dominant Genetic Disorder
• 3. X-Linked Recessive Genetic Disorder

• 1. Neither parent has the disorder but their child does
• 2. Parents are carriers

• Examples:
• 1. Cystic Fibrosis
• 2. PKU
• 3. Tay-Sachs

• 1. Affected children usually have at least one affected parent
• 2. Affected parents can have