You have two true-breeding plants, one with red flowers and one with blue flowers. You cross these plants and produce 1000 offspring: 249 red-flowered offspring, 252 blue-flowered offspring, and 501 offspring which express both of the parental phenotypes by having red and blue striped flowers. Which of the following patterns of inheritance best explains the results you observed?

A. The red pigment allele is completely dominant over the blue pigment allele.
B. The blue pigment allele is incompletely dominant over the red pigment allele.
C. The red and blue pigment alleles are codominant.
D. Blue pigment production is controlled a temperature sensitive allele.


Answer: C. The red and blue pigment alleles are codominant.

Biology & Microbiology

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