Which of the following did not play a role in the eradication of smallpox?
A. Ease of diagnosis by readily recognized clinical features
B. A short period of infectivity
C. No known reservoir outside of human hosts
D. The availability of effective antiviral agents that block replication
E. All of these characteristics played a role in the eradication of smallpox
Answer: D
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Albinism is a recessive disorder in which the skin and hair fail to produce pigment. The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism. The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder.
What is Geoff's genotype?
A. nn B. NN C. Nn D. Cannot be determined
A muscle can exert force while remaining the same length (e.g., When you lift a heavy bucket of cattle feed). This is known as:
A. isometric contraction. B. geometric contraction. C. isometric relaxation. D. shortening contraction.
The technique known as ________ relies on the fact that although the PCR fragments are about the same ________, they differ in ________. The DNA denaturing rate on a gel then varies with the ________ content, DNA sequence, and chemical gradient. Hence, similar fragments can be separated and identified.
What will be an ideal response?
Both minisatellite repeats (10-100 bp) and microsatellite repeats (< 10 bp) are called variable number tandem repeats and are used for DNA fingerprinting to unambiguously identify specific individuals by their DNA. How does this technique work?
What will be an ideal response?