During which of the following stages of the cell cycle would a chromosome consist of only a single chromatid?

A) G1
B) G2
C) mitotic prophase
D) mitotic metaphase
E) All of the choices are correct.


A) G1

Biology & Microbiology

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DNA is used as a template for making proteins and RNA.

DNA polymerase and ligase. DNA helicase. DNA helicase and polymerase. none of the answer choices are correct

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The atria of the heart

A. are separated from each other by the interventricular septum. B. function primarily as reservoirs for blood collection. C. function primarily as the pumps of the heart. D. receive blood from the aorta and pulmonary trunk. E. have all of these characteristics

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Figure 8.17 The accompanying figure represents ____.

A. cloning with a stem cell B. somatic cell nuclear transfer C. genetic manipulation of a single gene D. microsurgical manipulation of a chromosome E. embryonic cloning

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After a copper smelter begins operation, local downwind populations of plants begin to adapt to the resulting air pollution. Scientists document, for example, that the acid tolerance of several plant species has increased significantly in the polluted

area. This is an example of A) stabilizing selection. B) disruptive selection. C) directional selection. D) genetic drift.

Biology & Microbiology