Punnett squares Transitional Reasoning Practice
1 Biology practice questions on Punnett squares. Questions that build towards applied reasoning.
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- 1.
A botanist crosses a purple-flowered, dwarf pea plant of known genotype Pptt with an unknown parent plant, where purple flower color (P) is dominant to white (p) and tall stem (T) is dominant to dwarf (t). The resulting progeny exhibits an equal phenotypic ratio of 1 purple tall : 1 purple dwarf : 1 white tall : 1 white dwarf. Based on Mendelian inheritance and Punnett square analysis, what is the genotype of the unknown parent plant?
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