Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Cyndi grows thousands of B. rapa plants from seed and carefully watches for any unusual plants that might be a new mutation. She has been watching a small seedling whose leaves continue to develop, but the stem is not elongating. The result is a cluster, or rosette, of leaves sitting just above the soil surface. After 15 days the plant is beginning to produce flowers but is still a rosette. Cyndi is encouraged and hypothesizes that rosetteis a recessive mutation.
-Describe the first cross she should make and the predicted results.
Because B. rapa is an annual plant, the one rosette individual dies. Cyndi would like to continue her study of this mutation, but all od the offspring from her original cross were normal. There are no more plants with the rosette mutation.
-What can Cyndi do to continue her investigation of rosette? What would be the results of these "next steps"?
-What results would you expect if Cyndi crosses her new generation of rosette plants with a known heterozygous plant of normal height?
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