Amanda's parents realized that her body was not developing properly about the time she was 12 years old. She was shorter than most of her friends and was not going through changes normally associated with female puberty. They took her to a doctor who initially diagnosed Amanda with Turner Syndrome because of her physical features. He ordered a karyotype that confirmed his diagnosis. Amanda was born with only one X chromosome. Although there is no specific cure, the doctor was able to treat her and correct some of the problems associated with the condition. For example, she received growth hormone to improve her growth and estrogen to help her develop the physical changes of puberty.
Amanda's abnormal number of sex chromosomes resulted from ______.
A) independent assortment of chromosomes
B) crossing over
C) nondisjunction
D) random fertilization
Ans: C) nondisjunction
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What will be an ideal response?
Placing celery sticks in fresh water will make them more turgid and harder. This is because
A. salt moves from the water into the celery sticks. B. the celery is hypotonic to fresh water. C. the celery is hypertonic to fresh water. D. water moves from the celery sticks into fresh water. E. the celery is isotonic to fresh water.
A halophile would ________ in a high salt environment.
A. undergo plasmolysis B. become crenated C. form endospores D. thrive E. undergo osmotic lysis
As fatigue increases, the risk of injury ______.
a. stays the same b. becomes unavoidable c. increases d. decreases