Biology · Genetics
Doubled haploids (DH) are plants derived from single immature pollen and doubled artificially to form diploids. A DH population was created from F1 progeny derived from a cross between two parents (P1 and P2), one resistant (R) and the other sensitive (S ) to white rust. Th e parents, F1, and DH population were profiled with a set of co-dominant markers. Let profiles 1 and 4 represent parental types, and 2 and 3 represent recombinant types. Which of the following correctly represents the expected distribution (%) of the 4 different DH progeny profiles assuming that the DNA marker is (i) unlinked to the gene governing the trait and (ii) linked at a distance of 10 cM?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(i) Unlinked: 25, 25, 25, 25; (ii) Linked: 37.5, 12.5, 12.5, 37.5
- 2(i) Unlinked: 37.5, 37.5, 12.5, 12.5; (ii) Linked: 45, 5, 5, 45
- 3(i) Unlinked: 25, 25, 25, 25; (ii) Linked: 45, 5, 5, 45✓
- 4(i) Unlinked: 37.5, 37.5, 12.5, 12.5; (ii) Linked: 5, 45, 45, 5
Correct answer
(i) Unlinked: 25, 25, 25, 25; (ii) Linked: 45, 5, 5, 45
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