Which of the following statements is false?
A) An individual with Klinefelter syndrome generally has one Barr body.
B) An individual with Turner Syndrome has no Barr bodies.
C) In a cell with X chromosomes lacking the XIC, there is still X inactivation.
D) Dosage compensation is accomplished in humans by inactivation of the Y chromosome.
E) A typical XX human female has one Barr body.
Answer: D
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Recombinant DNA is ____
a. DNA encoding restriction endonucleases b. a gene of interest found in the genome c. DNA fragments from the same organism that have been joined together to form a single molecule d. DNA fragments from two or more different sources that have been joined together to form a single molecule e. a plasmid containing DNA from a single source
A homeotic gene regulates _____
a. where body parts form c. secondary sexual traits b. milk production d. sperm formation
The inability of bees to pollinate the flowers of
certain sage plants is an example of a. temporal isolation. b. hybrid inviability. c. mechanical isolation. d. gamete mortality. e. behavioral isolation.
Substances given off by yeasts during fermentation are
a) alcohol b) carbon dioxide c) organic acids d) all of these