Which of the following is one method in which a change in the DNA leads to genetic changes in a population?
A) mutation B) founder effect C) genetic drift D) bottleneck effect
Answer: A
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What is the purpose of MARs and SARs?
A. To bind to the nuclear matrix B. To form loop structure C. To condense DNA D. All of the answers are correct
Which of the following is not true of sex-limited genes?
1.They express only in males. 2.They are found on the X chromosome. 3.They do not occur until puberty. 4.Expression is dependent on gender.
The oxygen content of air at sea level is approximately
a. 21 percent. b. 78 percent. c. 0.04 percent. d. 0.96 percent. e. 100 percent.
Which of the following is common to the development of birds and mammals?
A) the formation of an embryonic epiblast and hypoblast B) the formation of an embryonic trophoblast C) the formation of an embryonic yolk plug D) the formation of an embryonic gray crescent