How did Bateson and Punnett's work with comb morphology in chickens differ from the dihybrid work of Mendel?
A. They were working with sex-limited traits.
B. Their F2 offspring displayed 4 unique phenotypes, not the four combinations of two phenotypes expected in a Mendelian cross.
C. ½ of their combinations were lethal.
D. The expression of their trait varied by the environment in which the chickens were raised.
B
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Over human history, which process has been most important in improving the features of plants that have long been used by humans as staple foods?
A) genetic engineering B) artificial selection C) natural selection D) sexual selection E) pesticide and herbicide application
Most human somatic cells are:a
polyploid. b. diploid. c. aneuploid. d. tetraploid. e. haploid
Although discussed with the bacteria, Rickettsias are small obligate intracellular parasites and are therefore more properly classified as viruses.
Answer the following statement true (T) or false (F)
While at the scene of an incident in which several patients were possibly exposed to lewisite, you are informed that an unresponsive patient with multiple blisters on his body and inadequate breathing is being brought to you for treatment. You should:
A) prepare your intubation equipment and set up two IV lines of normal saline. B) have the appropriate antidote ready and notify the burn center of the situation. C) ensure that the patient has been decontaminated before initiating any treatment. D) don the appropriate personal protective equipment to avoid cross-contamination.