ETHC 210 Exam 2

ETHC 210 Exam 2 Liberty University Answers

  1. About 30% of chromatin is histone.
  2. The sugar part of the DNA which makes up the sugar-phosphate backbone is ribose.
  3. Telomeres are found on the end of chromosomes.
  4. This scientist showed in 1928 that there was a transforming principle in cells:
  5. The physical structure of DNA was discovered in 1953 but biochemist Friedrich discovered a phosphate rich substance in the nucleus which he named;
  6. Polyploid cells have extra chromosome sets.
  7. Maternal serum markers and ultrasound findings are used to screen for elevated risk of trisomy in a fetus.
  8. Klinefelter’s syndrome is characterized at the chromosome level as XYY.
  9. Which of the following is true about Trisomy 21?
  10. Meiosis in the female gametes which results in an oocyte is called oogenesis.
  11. Which one of the following trisomy conditions has a 85% survival rate at one year after birth?
  12. Centromeres are found on the end of chromosomes.
  13. This scientist was important in that she obtained an x-ray photo of DNA which helped determine its structure:
  14. DNA is highly condensed and compacted to fit into the cell nucleus. During its condensation process it wraps around a highly conserved protein called:
  15. XYY males were once considered to:
  16. Homologous pairs of chromosomes line up at the beginning of meiosis I and meiosis II.
  17. Meiosis II is also called equational division.
  18. The single building block unit of DNA is the nucleotide.
  19. In order to work with DNA in the lab to look at it sequence a lot of DNA is typically needed since it is so small. Many copies of DNA are made using a process called:
  20. A day after fertilization in the zygote undergoes the type of nuclear division called:
  21. Men with XXY syndrome can father children with medical help.
  22. Trisomy 13 children tend to have more severe health abnormalities than children with trisomy 21.
  23. PCR has been used to amplify the DNA from a 7000 year old mummy.
  24. There are two ways that chromosomes can be arranged to produce Trisomy 21.
  25. Typically a human female will release approximately oocytes during her reproductive lifetime.
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