A population that exhibits only one allele at a particular gene is ____ for that allele
Fill in the blank with the appropriate word.
fixed
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Which of the following contributes to the extensive variability of immunoglobin genes?
A. The genes for the light-chain variable regions undergo rearrangement in germ-line cells. B. RNA transcripts from the recombinant genes undergo splicing that further changes the combinations in the final protein chains. C. The light chains generated by rearrangement and splicing can combine with the numerous heavy chains that have also undergone rearrangement and splicing. This results in even more variability in the final assembled antibody. D. The genes for the heavy-chain variable regions undergo rearrangement in germ-line cells. E. All of the choices given are correct.
Which of the following is NOT a characteristic of Natural Killer (NK) cells?
What will be an ideal response?
While walking in a tropical forest, you come upon a 6-meter-tall plant that shows no evidence of seed production. The plant is most likely a(n)
A) angiosperm. B) gymnosperm. C) alga. D) bryophyte. E) fern.
How does photosynthesis benefit nonphotosynthetic organisms such as humans?
What will be an ideal response?