Tallness (T) is dominant to dwarfness (t), while red (R) flower color is dominant to white (r). The heterozygous condition results in pink (Rr) flower color. A dwarf, red snapdragon is crossed with a plant homozygous for tallness and white flowers. What are the genotype and phenotype of the F1 individuals?
A) ttRr-dwarf and pink
B) ttrr-dwarf and white
C) TtRr-tall and red
D) TtRr-tall and pink
E) TTRR-tall and red
Ans: D) TtRr-tall and pink
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Indicate whether the statement is true or false.
Several lines of research provide strong evidence that ____ to environmental signals influence behavior
a. epigenetic responses b. epigenetic feedback c. base analog reconstruction due d. base analog reactions e. base analog responses
In the case of the peppered moths in England, when Kettlewell set up cameras to document that more white or black moths were eaten by birds on clean or sooty trees, he was verifying which factor involved in evolution by natural selection?
A. Some individuals are better adapted to a particular environment than other individuals. B. The organisms vary in traits and that these traits may be acquired during a lifetime. C. The variation is inherited. D. More young are born than can survive, so there will always be competition.
The relationship between a plant and mycorrhizal fungi is best described as
A) parasitic. B) competitive. C) mutualistic. D) commensal.