Which of the following statements about sex chromosomes is true?
A) The Y chromosome is large and long, and the X chromosome carries most of the genetic material.
B) Both boys and girls are born with several pairs of X and Y chromosomes.
C) When gametes form in females, the X and Y chromosomes separate into different cells.
D) The sex of a new organism is determined by whether an X-bearing or a Y-bearing sperm fertilizes the ovum.
Answer: D
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Define presbycusis and explain its cause.
What will be an ideal response?
You are trying to detect the expression on your roommate’s face as you talk with her late at night with the light turned off. What is the best approach??
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