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. The brothers share the same mitochondrial DNA.
B. The sequence of mitochondrial DNA has not yet been determined.
C. Because mitochondrial DNA is inherited in a paternal pattern.
D. There are no molecular techniques available that allow one to analyze mitochondrial DNA.
Answer: A
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If the probability of X occurring is 1 in 4, and the probability of Y occurring is 1 in 5, the probability
of both occurring is
a. (1/4)2 + (1/5)2 = (1/16) + (1/25) = (25/400) + (16/400) = 41/400. b. (1/4) + (1/5) = (5/20) + (4/20) = 9/20. c. (1/4)2(1/5)2 = (1/16)(1/25) = 1/400. d. (1/4)(1/5) = 1/20. e. (1/4 + 1/5)2 = (5/20 + 4/20)2 = (9/20)2 = 81/400.
Which level of membrane permeability allows the cell to reach equilibrium with its environment the fastest?
a. 0.05 b. 0.10 c. 0.20 d. None of the above. Membrane permeability does not influence the time it takes toreach equilibrium.
A strain of a cereal grain can be either dark tan, medium-dark tan, medium tan, light tan, or cream colored. When a dark tan and a cream plant are crossed, all F1 are medium tan
The F2 are distributed in a ratio of 1:4:6:4:1 from darkest to lightest. How many genes are involved in this coloration?
Water is important to biology for many reasons including because it:
What will be an ideal response?