How do errors in meiosis cause human genetic disorders?
What will be an ideal response?
Errors in meiosis (called nondisjunction) can result in gametes with abnormal numbers of sex chromosomes or autosomes. Many people with abnormal numbers of sex chromosomes have distinguishing physical characteristics, and some have difficulty reproducing. Abnormal numbers of autosomes typically lead to spontaneous abortion early in pregnancy. In rare instances, the fetus may survive to birth, but mental or physical deficiencies always occur. The likelihood of abnormal numbers of chromosomes increases with increasing age of the mother and, to a lesser extent, the father.
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T cells undergo immune selection FOR potential antigen-reactive cells and selection AGAINST those cells that react strongly with self-antigens
Indicate whether the statement is true or false.
A previously unknown virus that causes raised, itchy rashes and generalized lethargy in infected individuals is identified. This virus has a low mutation rate, is highly contagious, has not been associated with any reported incidents of serious injury or death, and its proteome is not yet completely understood. Which form of treatment should be developed to limit the extent of the outbreak safely and quickly as possible?
a. antiviral drugs b. live vaccine c. killed vaccine d. homeopathic drugs
Which of the following is NOT a lipid?
a. steroids b. triglycerides c. oils d. waxes e. monosaccharides
Who is considered to be the father of modern antibiotics?
A. Domagk B. Watson C. Chargaff D. Crick E. Fleming