Which aspect of population genetics refers to chance fluctuations of allele frequencies resulting from sampling error and is more prominent in small, isolated populations?
A) founder effect
B) mutation
C) gene flow
D) gene drift
E) bottleneck effect
D
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While analyzing forensic evidence gathered at a crime scene, a lab technician assigned to the case compares DNA collected at the scene to DNA from three suspects. The technician finds that all three suspects have genetic maps that are similar to the DNA collected at the scene, but they all have a number of unique markers that differ from the DNA evidence. What conclusion can be drawn from these facts?
a. The evidence from the crime scene has been contaminated and is no longer admissible in court. b. All three suspects belong to the same family as the person who left their DNA at the crime scene. c. All three suspects probably belong to the same species as the individual who left DNA at the scene. d. None of the suspects were at the crime scene, and they no longer need to be investigated in this case.
The smaller the cell, the more effectively it can obtain raw materials and eliminate waste.
a. true b. false
Novel phenotypic adaptations can arise as a result of changes only in how organisms develop.
Answer the following statement true (T) or false (F)
Which one of the following dissolves blood clots?
a) Streptokinase b) Streptolysin c) Hyaluronidase d) Deoxyribonuclease