Answer the following questions. Use Punnett Squares to support your answers when

Question

Answer the following questions. Use Punnett Squares to support your answers when appropriate. You find that if you cross true-breeding white rabbits with true-breeding black rabbits all of the offspring have purple stripes. You cross the F1 generation (cross a purple-striped rabbit with another purple-striped rabbit) and produce 85 white rabbits, 160 purple-striped rabbits, and 75 black rabbits. What type of inheritance is this? What is the approximate genotype ratio of the F2 generation? You find a fruit fly mutation that creates warped wings. When you cross a warped-wing female with a wild type male, 52 mutant females and 48 mutant males are produced. When you cross an F1 female with an F1 male, you count 11

Explanation / Answer

White rabbits (bb) X black rabbits (BB)

F1 offspring: Bb (purple striped)

Bb X Bb

F2 offspring

The offspring obtained were 85 white, 160 purpole striped and 75 black.

Genotype ratio 1 white: 2 purple stripes : 1 black

The genetic inheritance observed is incomplete dominance with genotype ratio 1:2:1.

male / female B b B BB (black) Bb (purple stripe) b Bb (purple stripe) bb(white)

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