Human Trait Technologies Practice Test

A lab uses CRISPR to change a gene in mosquitoes so that many offspring develop as males instead of females. In a contained population started with 100 mosquitoes, the percent of males rises from 50% to 85% over 4 generations. Humans can influence trait inheritance using technology. Which prediction about trait outcomes is supported by the scenario if the same CRISPR change continues to be passed on?

A student looks at this model and says: “Because the arrows point from the strongest sheep to the next generation, the technology forces every lamb to be strong.” The actual scenario: a rancher uses selective breeding by mating only the strongest sheep for 5 generations. The percent of lambs that meet a strength test increases from 30% to 60%, not 100%. Humans can influence trait inheritance using technology. Which statement best identifies the error in the student’s claim?