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A 25 year old man is found to cafe au lait marks and neurofibromas isolated to his left leg. You diagnose him with segmental neurofibromatosis type 1 (NF1). What is the mechanism by which segmental neurofibromatosis type 1 occurs?

Two brothers are affected with neurofibromatosis type 1. They inherited a mutation in the NF1 gene from their mildly affected father. One brother has multiple cutaneous neurofibromas, mental retardation and an optic glioma (brain tumor). The other brother has only cafe au lait spots and axillary freckling. The difference in phenotypes between the two brothers is an example of which of the following principles?

An AI will always present itself using denotative (dictionary) meanings of words and never use metaphorical language.

Generative AI models learn from vast databases of existing information, which can sometimes perpetuate bias or misinformation.

AI can perform all writing tasks, completely replacing the need for human writing skills in the future.

In our English course, a guiding principle is that for each of your essays, the writing you submit must be your own work, not the work of a machine.

Using AI to find sources and generate false citations is an ethical use of the tool.

Using an AI to help structure an outline or organize thoughts for an essay is generally considered an ethical use of the tool.

Which of the following is a characteristic of eukaryotic cells?

What is the significance of normal flora in the human body?