What Is a Two- Point Test Cross, Involving a Dihybrid

question 13

Multiple Choice

What is a two- point test cross, involving a dihybrid F1 fly, used for when mapping genes?

• A) to determine if the F1 fly is homozygous dominant or heterozygous
• B) to determine the allele combinations that a homozygous recessive fly can create
• C) to determine which alleles are dominant and which are recessive
• D) to determine the recombination frequency between two genes
• E) to determine the allele combinations that the F1 fly can produce

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