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We are here to help you improve your grades on classroom, midterm, and final exams. These 500 questions will help you study more effectively, use your preparation time wisely, and get the final grade you want. This book gives you 500 multiple-choice questions that cover the most essential course material. Each question has a detailed answer explanation. These questions give you valuable independent practice to supplement your regular textbook and the groundwork you are already doing in the classroom. You might be the kind of student who needs to study extra questions a few weeks before a big exam for a final review.

Or you might be the kind of student who puts off preparing until right before a midterm or final. No matter what your preparation style, you will surely benefit from reviewing these 500 questions that closely parallel the content, format, and degree of difficulty of the questions found in typical college-level exams. These questions and their answer explanations are the ideal last-minute study tool for those final days before the test. Remember the old saying Practice makes perfect. If you practice with all the questions and answers in this book, we are certain that you will build the skills and confidence that are needed to ace your exams. Good luck! Editors of McGraw-Hill Education

Gene expression is NOT impacted by which of the following factors? (A) An organisms behaviors (B) Nucleus size (C) Timing of reproduction (D) Temperature outside the cell (E) Environment inside the cell . Which of the following defines the word phenotype? (A) Gene transmission (B) Gene that directs the development of a characteristic (C) Pattern of genes in the chromosomes (D) Traits, behaviors, and characteristics (E) Part of a DNA molecule . How many chromosomes do cells in the human body typically contain? (A) 92 (B) 46 (C) 23 (D) 12.5 (E) 6 . What condition is needed for a recessive allele to be expressed as the organisms phenotype? (A) A pairing with a dominant allele (B) A pairing with an allele for a different gene that is also recessive (C) A pairing with the same allele on the corresponding gene (D) A pairing with any recessive allele in the DNA (E) No pairing needed for the recessive allele to be expressed . Which concept describes the process of inheriting traits that is influenced by many different genes? (A) Natural selection (B) Gene transmission (C) Gene expression (D) Natural selection (E) Polygenetic inheritance . Which population of people is often studied to explore the impact of genetics? (A) Caucasian individuals (B) Individuals from developing countries (C) Younger siblings (D) Identical and fraternal twins (E) Childless adults .