Describe how only thousands of different heavy and light chain genes could produce many millions of distinct antibodies
What will be an ideal response?
The arms of the Y end in a "hand" or "pincer" made up of a light chain and heavy chain. The interaction of the two chains as they bind the antigen determines the specificity of the molecule. Thus 1000 different heavy chains interacting with 1000 light chains can produce 1000 times 1000, or 1 million, different combinations.
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Random changes in gene frequency that occur in small populations describes the concept of
a. genetic drift. b. convergent evolution. c. adaptive radiation. d. sympatric speciation. e. parapatric speciation.
Somatic mutations may be inherited by the next generation
Indicate whether the statement is true or false
What is the possible advantage of being heterozygous for the sickle-cell gene?
What will be an ideal response?
Which of the following is required for photons to be used as a source of energy?
a. They must be particles. b. They must be energized. c. They must be absorbed by a molecule. d. They must be reflected by a molecule.