A skin cell of a red fox has 34 chromosomes. You look at the cell under a microscope and see that it has 34 chromosomes and one nucleus. Several hours later, you look at the same cell again and see that it has double the amount of DNA and one nucleus. A
little while later, you see that it has 68 chromosomes and two nuclei. What stage of the cell cycle was this cell in when you viewed it at each time point?
A) First view: G1; second view: G2; third view: telophase
B) First view: G1; second view: metaphase; third view: cytokinesis
C) First view: S; second view: prophase; third view: cytokinesis
D) First view: G0; second view: G2; third view: telophase
Answer: A
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If a woman has a declining level of various hormones in her urine it may indicate ________
a. cancer b. cardiovascular disease c. diabetes d. stroke e. menopause
The kidneys are both protected and held in place by cushions of fat. In cases of rapid weight loss, the kidneys may drop to a lower position, possibly causing kinks in a nearby tubular organ. If this happens, urine will back up into the kidneys, severely damaging them. What organ(s) is/are most-likely kinked in this situation?
A. urethra B. renal arteries C. ureters D. renal veins E. nephrons Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about urine flow from the kidney? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The above figure represents which of the
following chromosomal changes:a. inversion b. deletion c. duplication d. translocation e. aneuploidy
Which is easier to establish in a pure-breeding
population, a dominant or a recessive gene? What will be an ideal response?