Probability in genetics Transitional Reasoning Download PDF

Questions

1. 1.

   In a flowering plant, flower color is governed by gene A (purple A is dominant to white a), stem height by gene B (tall B is dominant to dwarf b), and seed shape by gene C (round C is dominant to wrinkled c), with all three gene pairs assorting independently. A geneticist crosses a trihybrid plant with the genotype AaBbCc with a plant having the genotype AabbCc. Based on the rules of probability, what is the likelihood that an offspring from this cross will display the dominant phenotype for all three traits?

   • A) 3/16
   • B) 9/32
   • C) 27/64
   • D) 3/8