True breeding thick-stem, broad-leaf plants were crossed to true breeding thin-s

Question

True breeding thick-stem, broad-leaf plants were crossed to true breeding thin-stem, narrow-leaf plants. The F1 progeny were thick-stem with broad-leaves. The F1 progeny were crossed to true breeding thin- stem, narrow-leaf plants. Among 1000 progeny Nurmberofprogeny! Stemphenotype_ Leafphenotype 7. thick Leaf 400 400 100 100 thin thick thin narrow broad Most likely, the genes for stem width and leaf width are A. unlinked. B. linked and separated by 10 Centimorgans C. linked and separated by 20 Centimorgans. D. linked and separated by 50 or more Centimorgans E. Both A and D are possible. Work space. Another scientist studying another species does the following cross. True breeding thick-stem, broad- leaf plant broad-leaves. The F1 progeny were crossed to true breeding thin-stem, narrow-leaf plants. Among 1000 progeny Number of progeny 8. ts were crossed to true breeding thin-stem, narrow-leaf plants. The F1 progeny were thick-stem with Stem phenotype Leaf phenotype 250 250 250 250 thick thin thick thin narrow broad Most likely, the genes for stem width and leaf width are A. unlinked. B. linked and separated by 10 Centimorgans C. linked and separated by 20 Centimorgans. D. linked and separated by 50 or more Centimorgans E. Both A and D are possible. Work space.

Explanation / Answer

Ans-7 (B) Ans-8 (C)

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