An ejaculate containing up to ________ percent abnormal spermatocytes is considered normal.
A) 10
B) 20
C) 40
D) 50
C) 40
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Reductive dehalogenation involves the removal of halogens, like chlorine or fluorine, while adding electrons at the same time.
Answer the following statement true (T) or false (F)
Suppose that a DNA change results in the substitution of one codon for another, but the codon specifies the same amino acid as it did originally. What type of mutation has occurred?
a. a chromosomal mutation b. a frameshift mutation c. a silent mutation d. a missense mutation
Acridine dyes distort the structure of DNA causing (frameshift/missense/nonsense) mutations in gene sequences. (Answer in terms of the effect on gene function.)
What will be an ideal response?
If the strength of a lens is the reciprocal of its focal length (1/f ), which of the following lenses will have the greatest strength?
A. A lens with a focal length of 1 mm B. A lens with a focal length of 100 mm C. A lens with a focal length of 0.1 mm D. A lens with a focal length of 1cm