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Chapter 15 The Chromosomal Basis of Inheritance. Timeline. Sutton. Morgan. Fruit Fly. Reasons. Genetic Symbols. Examples. Recessive mutation: w = white eyes w+ = red eyes Dominant Mutation Cy = Curly wings Cy+ = Normal wings. Morgan Observed:. Morgan crossed.
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Examples • Recessive mutation: • w = white eyes • w+ = red eyes • Dominant Mutation • Cy = Curly wings • Cy+ = Normal wings
The F1 offspring: • All had red eyes. • This suggests that white eyes is a genetic _________?
Example b+b vg+vg X bb vgvg (b+ linked to vg+) (b linked to vg) If unlinked: 1:1:1:1 ratio. If linked: ratio will be altered.
Comment - only good for genes that are within 50 map units of each other. Why?
Comment • Watch how questions with sex linkage are phrased: • Chance of children? • Chance of males?