True or false? in diploid organisms, a dominant phenotype will only be expressed if the individual is homozygous dominant for that trait

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

List charasteristics of athenosphere

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?