Queen Victoria, a former monarch of England, was a carrier of which devastating X-linked recessive disorder that affected many of her male descendants?
a. galactosemia
b. hemophilia A
c. achondroplasia
d. Huntington's disease
b
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What is the survival rate for children with childhood leukemia?
A. 99% B. 30% C. 50% D. 10% E. 80%
Which of the following chemicals is the first
hormone secreted by the intestinal tract in response to the presence of food? a. insulin b. cholecystokinin c. gastric inhibitory peptide (GIP) d. gastrin e. secretin
The genetic code is
A) a set of two base sequences coding for each amino acid. B) used during the translation of DNA to mRNA. C) read in sets of three bases called codons. D) different in different organisms.
Aneuploid human embryos are least likely to survive except those involving:
A) chromosome 6, 7, 8, 9, 10. B) chromosome 1, 2, 3, 4, 5. C) chromosome 1, 2, 3, X, Y. D) chromosome 11, 12, 14, 15. E) chromosome 13, 18, 21, X, Y.