A chromosome's gene sequence that was
ABCDEFG before modification and
ABCDCDEFG afterward is an example of
a. inversion.
b. deletion.
c. duplication.
d. translocation.
e. aneuploidy.
C
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A scientist fused a mouse cell and a human cell, then treated the cell with specific antibodies covalently linked to
colored fluorescent dyes (antibodies to mouse proteins were labeled green; antibodies to human proteins were labeled red). Forty minutes later, what will the researcher observe?
a. The fused cell will still be half red and half green. b. The red and green fluorescent labels will be uniformly distributed throughout the entire membrane. c. The red and green labels will be distributed in intermingled patches. d. The red and green labels will flash intermittently. e. The red and green labels will be distributed in a swirling pattern.
If long or round are homozygous forms of an
incompletely dominant gene, and oval is the phenotype of the heterozygote, give the F2 ratio of the cross between long and round (both genotype and phenotype). What will be an ideal response?
DNA moves within an electric field because it
A) is negatively charged. B) is positively charged. C) makes up chromosomes, which are slightly electromagnetic. D) can possess different charges (positive or negative), depending on its base sequence.
Intermittent sterilization by non-pressurized moist heat is also called
A. boiling B. Tyndallization C. Pasteurization. D. Denaturation