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1. The B and N genes are 25 map units apart on a chromosome. a) Following a dihybrid testcross, how many offspring of 250 would you expect to display a recombinant phenotype? a) If you performed a dihybrid testcross with a cis dihybrid, what would be the genotypes of both recombinant offspring phenotypic classes?

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Answer #1

1) since B and N gene are 25 unit apart means 25% crossing over.

and 25% of 250 will be 62 offsprings.

2)

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