Genetic screening can be used to identify:a
only diseases caused by more than one gene.
b. diseases caused by single gene mutations.
c. non-genetic conditions..
d. chromosomal abnormalities.
e. predicted date of birth.
b
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An enzyme that cleaves internal phosphodiester bonds of a DNA molecule is a (n)
A. ligase. B. exonuclease. C. methylase. D. endonuclease.
"She is a carrier of the cystic fibrosis trait." This statement acknowledges that this person is
A. homozygous for the trait. B. heterozygous for the trait. C. trisomic. D. carrying two recessive alleles.
In order for transcription to be initiated
A. DNA polymerase must have access to the RNA and must also be capable of binding to the gene's promoter. B. DNA polymerase must have access to the DNA double helix and must also be capable of binding to the gene's promoter. C. RNA polymerase must have access to the DNA double helix and also must be capable of binding to the gene's operator. D. RNA polymerase must have access to the DNA double helix and must also be capable of binding to the gene's promoter. E. RNA ligase must have access to the DNA double helix and must also be capable of binding to the gene's promoter.
The pericardial cavity is part of the _____ cavity, which is included in the _____ cavity
dorsal; abdominal pelvic; abdominal thoracic; dorsal thoracic; ventral