McGraw-Hill Online Learning Center Test

McGraw-Hill Online Learning Center Test


1. Review the image and answer the following questions.

What is the explanation for the pattern of inheritance shown in this diagram of crosses of Japanese four-o'clocks?

A. This pattern of inheritance shows codominance in flower color genes.
B. This pattern of inheritance is typical of multiple alleles.
C. This pattern of inheritance shows a high level of mutation, with new colors occurring in each new generation.
D. This pattern of inheritance shows incomplete dominance in flower color.


2. Why is the inheritance of flower color in this example not an instance of codominance?

A. In codominance, both genes are expressed equally, showing both traits; incomplete dominance shows a blending of traits.
B. Flower colors always blend, and produce intermediates with each generation.
C. Several pairs of genes are involved here and thus produce intermediate color patterns; codominance would produce multicolored flowers.
D. This is an example of codominance; codominance and incomplete dominance are essentially the same.
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