The probability that a boy whose mother is heterozygous for an X-linked trait inherits the recessive allele is
A) 1/16.
B) 1/8.
C) 1/4.
D) 1/2.
D) 1/2.
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Dr. John Doe, a research microbiologist for a university medical center, has been accused of sending Bacillus anthracis, the causative agent of anthrax, through the mail to the President. You, as a public health official with the CDC, have to determine if it is the same strain as the two strains of B. anthracis found cultured in his lab. Which method of identification would you use to compare these three bacterial samples?
A. Pulse-field gel electrophoresis B. Biochemical test identification C. Serological testing using agglutination D. Gram staining
Describe the difference between cytokinesis in animal and plant cells
What will be an ideal response?
Local edema, swollen lymph nodes, fever, soreness, and abscesses are indications of ________.
A. latency B. a syndrome C. inflammation D. sequelae E. toxemia
Gap genes of Drosophila embryos:a
organize the embryo into broad regions and influence the activity of pair-rule genes. b. are missing from the chromosomes of mutant flies. c. are genes that have moved to gaps on other chromosome during meiosis. d. cause gaps in the cell cycle. e. cause the death of embryos before they hatch.