Neco 2021 Biology Question 42
Practice objective / multiple choice question 42 from the 2021 Neco Biology examination.
A plant heterozygous for two linked genes A and B (genotype \\(A a B b\\) in coupling phase \\(AB/ab\\)) is test crossed with a plant homozygous recessive \\(a a b b\\). Among \\(2000\\) progeny the observed phenotypes are: \\(860\\) with dominant A and dominant B (\\(AB\\) phenotype), \\(860\\) with recessive a and recessive b (\\(ab\\) phenotype), \\(140\\) with dominant A but recessive b (\\(Ab\\) phenotype), and \\(140\\) with recessive a but dominant B (\\(aB\\) phenotype). Determine the recombination frequency between the two genes and the map distance in centiMorgans.
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About This Question
This is Neco 2021 Biology Question 42. It is one of the objective questions from the 2021 Neco Biology examination.
Difficulty level: Medium .
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