Which statement about lethal genes is most accurate? a) they cannot be maintained in a gene pool because the individuals do not survive. b) they cannot be maintained in a gene pool because they are always dominant. c) they can be maintained in a gene pool by heterozygous carriers when the allele is recessive and the individuals reproduce. d) they can be maintained in a gene pool if the allele is expressed before reproductive age.

Agenetically engineered corn plant is approved for agricultural use. the plant produces pollen that can make its own toxins. these toxins protect the corn plant against pests and no longer require the application of chemical pesticide. what is a likely impact on the farmer of growing such a variety of corn? a- the financial costs for the farmer would be lowered since less crops would be lost to pests. b-the financial costs for the farmer would be lowered since more crops would be lost to pests. c-the farmer may be held responsible for increasing chemical pollution. d-the farmer's expenses for pest control would increase due to an increase in bee population.