Joshua has O type blood and the Bombay phenotype. His partner, Alice, has AB blood and does not
have the Bombay phenotype, but her mother does. What are the possible blood types of the children of
Joshua and Alice?
A. A, B, and O
B. A and O
C. B and O
D. All O
E. A and B
A
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Which of the following may be used as sources of energy by chemolithotrophs?
A. Reduced nitrogen compounds B. Reduced sulfur compounds C. Hydrogen gas D. All of the choices are correct.
Cytogenetic mapping is accurate to within 500,000 base pairs, but not over this value
Indicate whether the statement is true or false
Bacterial and yeast artificial chromosomes are useful tools in molecular biology because
A) they can be used to directly infect human cells and thus treat genetic diseases. B) they are easy to genetically modify and insert into many different organisms. C) they can replace the natural chromosomes found in bacteria and yeast. D) they can carry large DNA fragments (>30,000 bp) such as large eukaryotic genes. E) they are easy to genetically modify and insert into many different organisms, including the direct infection of human cells for the treatment of genetic diseases.
Which of these is NOT a characteristic of sponges?
a) Amoebocyte cells transport food and make skeletal fibers and gametes. b) Flagellated choanocytes move water. c) Water enters through a single cavity, the osculum. d) sessile filter feeders e) body wall has two cell layers