You are a forensic technician working on a DNA sample obtained from a crime scene. Your job is to compare the unknown DNA sample with known DNA samples collected from five different suspects. Preliminary analysis using only a few DNA markers revealed that the unknown sample could possibly match two of the suspects. After consulting the case file, you find out that these two suspects are brothers (but not twins). You realize that you will have to do a more detailed analysis on the samples so that you can distinguish between the brothers and determine which brothers' DNA matches the unknown sample.Why can't you use mitochondrial DNA to distinguish between these two suspects?
A. There are no molecular techniques available that allow one to analyze mitochondrial DNA.
B. The sequence of mitochondrial DNA has not yet been determined.
C. The brothers share the same mitochondrial DNA.
D. Because mitochondrial DNA is inherited in a paternal pattern.
Answer: C
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A. axial skeleton. B. appendicular skeleton. C. mobile skeleton. D. central skeleton.
Which of the following best represents analogous structures?
A. the arm of a human and the leg of a human B. the wing of a bat and the wing of a butterfly C. the arm of a human and the wing of a bat D. the wing of a butterfly and the wing of a bee
When a signal arrives at the cell, it gets transduced. What is meant by the term signal transduction?
A. The signal is inactivated, so that cell stops responding. B. Signal transduction is how the receptor binds to the signal. C. The signal is transmitted inside the cell in another form. D. The mechanisms by which the cell responds to the signal are ducible.
Which organism has hemoglobin located in the fluid portion of the blood, giving it a red appearance?
A. grasshopper B. bird C. flatworm D. human E. earthworm