The diagram shows Mendel's test for flower color. He crossed a plant with white flowers with one that had purple flowers. Then he let the first-generations offspring self-pollinate to produce the second-generation offspring. What did Mendel call the factor for white flower color?
A. Heterozygous
B. Codominant
C. Recessive
D. Dominant

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.