In some genetically engineered corn plants,a dominant gene (BT)produces a protein that is lethal to certain flying insect pests that eat the corn plants.It was also found that the pollen could cause death in some flying insects.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

When the corn plant is heterozygous for BT, it has one dominant BT allele and one recessive bt allele. During meiosis, these alleles separate, and each gamete (pollen in this case) receives one allele randomly.

Half of the gametes will receive the BT allele, and the other half will receive the bt allele. Therefore, the proportion of the pollen that carries the dominant BT gene is 1/2 or 50%.

In Some Genetically Engineered Corn Plants,a Dominant Gene (BT)produces a Protein