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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Local edema, swollen lymph nodes, fever, soreness, and abscesses are indications of ________.
A. latency B. a syndrome C. inflammation D. sequelae E. toxemia
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?
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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.