How can you determine the genotype of a plant that displays the dominant form of a trait?

a)examine the genotype of the plant in question

b) look at the phenotype of the plant in question

c) perform cross-fertilization with a heterozygous plant

d) do a testcross with a homozygous recessive plant

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.