What mode of inheritance would best explain the results of Dr. Whiteback's crosses? b) How many genes and how many different alleles of these gene(s) are determining flower color according to your mode of inheritance?
1. During his study of the rare Idlewild Lady Slipper (a wild orchid), Dr. Jorge Whiteback discovered several variants of the typical "wild-type" phenotype. He found two varieties of lady slippers at different elevations: a lady slipper variety found in the valley with red flowers and a lady slipper found at higher
elevations with white flowers. When Dr. Whiteback did controlled crosses between lady slippers with red flowers and lady slippers with white flowers, all the offspring of this cross had pink flowers. After allowing pink
flowering lady slippers to self-fertilize, the next generation of plants had 112 red flowering plants, 218 pink flowering plants, and 108 white flowering plants.
1
a) What mode of inheritance would best explain the results of Dr. Whiteback's crosses?
b) How many genes and how many different alleles of these gene(s) are determining flower color
according to your mode of inheritance?
c) Define alleles using the appropriate notation for your answer in (a) and use that notation predict the
results of a cross between pink flowering lady slippers and white flowering lady slippers. Predict the
genotype(s) and
work and clearly label all answers.
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