Exam 4 Psychology Related

Review Exam 4 Psychology related questions and content

In order for one to have a recessive trait (e.g., having red hair), the person must receive?

  • A. At least one copy of a recessive gene from a parent
  • B. Two copies of a recessive gene, one from each parent
  • C. At least one copy of a recessive gene and at least one copy of a dominant gene
  • D. At least two copies of a recessive gene from one parent
Correct Answer: B

Rationale: Recessive traits are expressed when an individual inherits two copies of the recessive gene, one from each parent. Therefore, the correct answer is B. Choice A is incorrect as one copy of a recessive gene is not sufficient to display a recessive trait. Choice C is incorrect because having at least one copy of a dominant gene is unrelated to expressing a recessive trait. Choice D is incorrect because two copies of a recessive gene must come from both parents, not just one.