If you have been assigned the "Chimeras" passage on Read Theory (typically Level 9 or 10), you know it’s not just a simple myth lesson. The passage blends Greek mythology, modern genetics, and bioethics into a dense, challenging text. Many students struggle to distinguish between the mythological Chimera (a fire-breathing monster) and the scientific chimera (a single organism with two sets of DNA).
Read Theory tests your attention to detail. A common wrong answer is "an organism with DNA from two different species." While that can be a chimera, the biological definition is broader: two distinct fertilized eggs (zygotes) fusing. The passage emphasizes that even two human twins fusing creates a chimera, no other species needed. Question 3: Which of the following is an example of a natural chimera mentioned in the passage? Answer: A mother who carries her child’s cells in her body for years after giving birth. chimeras read theory answers
The author’s tone is neutral but cautious. They present the medical benefits (testing drugs, growing organs) but dedicate significant space to the ethical "mixing of human and animal" concerns. An answer like "Chimeras are dangerous and should be banned" is too extreme and not supported. An answer like "There are no real ethical concerns" ignores half the passage. Question 5: The word "congenital" (as used in the passage, referring to chimerism) most nearly means: Answer: Present from birth. If you have been assigned the "Chimeras" passage
In the context of a fraternal twin absorption, the condition is not a disease you catch but a developmental event in utero . Read Theory often adds this vocabulary question. "Contagious," "surgical," and "psychological" are incorrect. Question 6: Why does the author mention the mythological Chimera? Answer: To provide a vivid metaphor that helps readers understand the concept of hybrid beings before introducing the scientific definition. Read Theory tests your attention to detail
By using the guide above, you are not just getting the answers—you are learning how to deconstruct any comparative science-and-society passage on future reading comprehension tests.
This refers to microchimerism . The passage uses this as a shocking, natural example. Many students mistakenly pick "a sheep with a human liver" – but that is an artificial lab-made chimera, not natural. Read Theory specifically asks for natural examples to test comprehension. Question 4: Based on the information in the passage, which statement would the author most likely agree with? Answer: While chimeras offer medical promise, their creation raises difficult ethical questions that require careful regulation.
The passage does not simply define "chimera." It traces the term’s journey. The myth provides the metaphor, but the main focus is the scientific definition and its consequences. Distractors like "to describe the Greek monster in detail" are too narrow. Question 2: According to the passage, what is a biological chimera? Answer: A single organism composed of cells from two or more distinct zygotes.