Cells pass through regulatory checkpoints as they prepare to divide. If mutations are detected in the cell, normally __________ will initiate cell death.
a. tumor suppressor genes
b. oncogenes
c. proto-oncogenes
d. metastatic cells
Answer: c. proto-oncogenes
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The study of family trees in humans is called a _______ analysis
A. pedigree B. monohybrid C. dihybrid D. statistical E. probability
Which is a filamentous phage?
A. M13. B. T4. C. Lambda. D. TMV.
Which of the following images represents the expected results of a DNA gel for three individuals with different genotypes-homozygous dominant (lane 1), heterozygote (lane 2), and homozygous recessive (lane 3)?
What will be an ideal response?
Retrotransposons _____
A) use an RNA molecule as an intermediate in transposition B) are found only in animal cells C) generally move by a cut-and-paste mechanism D) contribute a significant portion of the genetic variability seen within a population of gametes