Neco 2024 Biology Question 27
Practice objective / multiple choice question 27 from the 2024 Neco Biology examination.
In Drosophila, genes \(A\) (wing shape) and \(B\) (eye colour) are linked on the same chromosome. A test cross of a heterozygote \(A^{+}B^{+}/ab\) with a double recessive \(ab\) produced 2000 progeny: 860 \(A^{+}B^{+}\), 820 \(ab\), 150 \(A^{+}b\) and 170 \(aB^{+}\). (a) Estimate the recombination fraction between the two genes. (b) Assuming no interference, calculate the expected proportion of offspring that will have normal wings and white eyes (genotype \(A^{+}b\)) in an F2 generation obtained by crossing two F1 heterozygotes.
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About This Question
This is Neco 2024 Biology Question 27. It is one of the objective questions from the 2024 Neco Biology examination.
Difficulty level: Medium .
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