Scientists can distinguish between DNA of different individuals, thus making this information useful in criminal investigations. The technique used is called
A. restriction fragment length polymorphisms.
B. societal polymorphisms.
C. Southern Blot.
D. hybridization polymorphisms.
E. molecular hybridization.
Answer: A
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Valeria has a serious disorder called fragile X syndrome and her brother does not have the disorder
Her mother does not have the disorder but her father does. What is the most likely inheritance pattern for fragile X syndrome? A. Autosomal dominant D. X-linked recessive B. Autosomal recessive E. Y-linked recessive C. X-linked dominant
The cytoplasm of a certain cell, such as a neuron, already has a high concentration of K+ ions. How can K+ ions continue to enter the cell?
A) Exocytosis B) Active transport C) Osmosis D) Infusion E) Facilitated diffusion
A number of trends have been identified that have become progressively more pronounced as nervous systems evolved greater complexity. From the list below, choose the item that is not one of these trends.
A. elaboration of the brain B. more sophisticated sensory systems C. differentiation of sensory and motor nerves D. All of these are among the major evolutionary trends.
A hunter was camping with his dog near a mountain spring where beavers were building a dam, and many animals came to drink. After a month, he developed severe watery diarrhea, abdominal pain, bloating, vomiting, and low-grade fever. His stool had a "rotten-egg" smell of hydrogen sulfide. What is the most likely parasite causing this patient's condition, and how is diagnosis confirmed?
What will be an ideal response?