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Author Question: What usually causes Down syndrome? A. Maternal infection during early pregnancy B. Fertilization ... (Read 72 times)

Arii_bell

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on: Jun 25, 2018
What usually causes Down syndrome?
 
  A. Maternal infection during early pregnancy
  B. Fertilization of an ovum containing an abnormal number of chromosomes
  C. An interaction of hereditary and environmental factors
  D. An abnormal gene transmitted by Mendelian inheritance

Question 2

A __________ is a set of HLA genes on one chromosome.
 
  A. karyotype
  B. haplotype
  C. plasmid
  D. polar body


nmyers

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Reply #1 on: Jun 25, 2018
Answer to Question 1

B

Answer to Question 2

B


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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

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