Probability in genetics Original Scenario-Based Download PDF

Questions

1. 1.

   In a subterranean research biodome, geneticists are breeding rare cavern beetles whose exoskeleton color and shell texture are governed by two independently assorting autosomal genes. Black exoskeleton (B) is completely dominant to silver (b), and smooth shell (S) is completely dominant to grooved shell (s). If two beetles heterozygous for both traits (BbSs) are crossed, what is the probability that their first offspring will either exhibit a silver, grooved shell or have the genotype BbSs?

   • A) 1/16
   • B) 3/16
   • C) 1/4
   • D) 5/16