QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED
◉ How many chromosomes can a gamate possess as a result of
nondisjunction?
A. 2n-1 only
B. 2n+1 or 2n-1
C. 2n+1 or n-1
D. n+1 or n-1. Answer: D
◉ This diagram of the human life cycle shows that
A. fertilization produces a haploid zygote
B. meiosis produces a diploid zygote
C. meiosis produces haploid sperm and egg cells
D. a diploid zygote undergoes meiosis to produce an adult human.
Answer: C
◉ What chromosomes belong to a normal human male?
A. 44 autosomes, one X chromosome one Y chromosome
B. 22 autosomes, and two Y chromosomes
,C. 44 autosomes, and two Y chromosomes
D. 46 autosomes, one X chromosome one Y chromosome. Answer: A
◉ A cell that completed the cell cycle without undergoing cytokinesis
would
A. have less genetic material than it started with
B. not have completed anaphase
C. have two nuclei
D. have its chromosomes lined up in the middle of the cell. Answer: C
◉ Which of the following will help prevent cancer and increase
survival?
A. limit exercise
B. eat a low-fiber, low-fat diet
C. seek early detection of tumors
D. smoke only cigarettes. Answer: C
◉ The 2n number for the cell depicted here is?
A. 2
B. 8
C. 1
D. 4. Answer: A
, ◉ 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
changed of puberty.. Answer: Amanda
◉ Amanda's abnormal number of sex chromosomes resulted from?
A. random fertilization
B. independent assortment of chromosomes
C. nondisjunction
D. depend assortment of chromosomes. Answer: C
◉ How many chromosomes does an individual with Turner syndrome
have?
A. 2n-1
B. n+1
C. n-1
D. 2n+1. Answer: A