In some genetically engineered corn plants the dominant gene Bt produces a protein that is lethal to certain flying insect pests that eat the corn plants.If the corn plant is heterozygous for Bt, what proportion of the pollen would carry the dominant gene?
A)all pollen
B)1/2
C)1/3
D)1/4
E)1/8

Question

Quizplus · Accepted Answer

Since the corn plant is heterozygous for Bt, it has one dominant allele (Bt) and one recessive allele (bt). During meiosis, there is a 50% chance of the Bt allele being present in each haploid pollen grain. Therefore, the proportion of the pollen carrying the dominant gene Bt would be 1/2 or 50%.

In Some Genetically Engineered Corn Plants the Dominant Gene Bt