Which of the following types of information would be most useful in an effort to move a DNA fragment from one plasmid vector to another, using molecular cloning techniques?
A. Data from cloning of Dolly the sheep
B. DNA fingerprint data
C. Restriction maps of the plasmids
D. Sequence of PCR primers
Answer: C
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Why do histone genes have the slowest molecular clock?
A. The structure of the histone gene must be conserved for DNA to function properly. B. Histone genes simply do not have the same rate of mutations. C. DNA-correcting mechanisms function more readily with histone genes. D. Cells have more histone genes than any other kind of gene. E. Histone genes normally have selfcorrecting mechanisms.
The gonads produce steroids. Which organelle would likely be present in this tissue?
A. ribosome B. lysosome C. smooth endoplasmic reticulum D. mitochondria E. contractile vacuole
A pathologic state begins with contact with a microbe.
Answer the following statement true (T) or false (F)
A plant breeder is attempting to breed a variety of corn with high oil content. Each generation, he crosses only those plants that have the highest oil content. Over time, the average oil content of his plants increases. He does this with two strains of plants. For Strain A, h2 = 0.3. For Strain B, h2 = 0.6. Which strain will more quickly increase in oil content with selection?
a. Strain A b. Strain B c. Strain C d. No difference