4. In Drosophila, echinus eye color (e) is recessive to wildtype eyes (e^+), cro

Question

4. In Drosophila, echinus eye color (e) is recessive to wildtype eyes (e^+), crossveinless wings (c) is recessive to wildtype wings (c^+), and scute bristles (s) is recessive to wildtype bristles (s^+). Two pure pure-breeding strains of flies are crossed to generate Fi offspring that are heterozygous for all three genes. The Fi flies are then crossed with flies that are homozygous for the recessive alleles in a three-point testcross. The progeny of the testcross are: a) In the spaces provided above classify each group of progeny as Parental (=non recombinant, SCO I, SCO II, or DCO

Explanation / Answer

Parental: Echinus eyes, wild type wings, wild type bristles and wild type eyes, crossveinless wings, scute bristles

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