Why are Drosophila P elements only activated in germline cells?
What will be an ideal response?
Ans: A germline-specific splicing event removes an intron that results in an mRNA that is translated to transposase. In somatic cells, the presence of this intron results in the production of a repressor protein that inactivates transposition.
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What can be inferred from the accompanying graph?
a. This reaction is endergonic, with a positive ?G. b. This reaction is endergonic, with a negative ?G. c. This reaction is exergonic, with a positive ?G. d. This reaction is exergonic, with a negative ?G. e. There is not enough information to make a determination.
Which type of defense mechanism is not classified as the first line of defense?
a. Chemical barriers b. Skin c. Mechanical barriers d. Physical barriers e. Leukocytes
Organs strung together functionally and usually structurally form
a. organs. b. systems. c. tissues. d. organelles.
The failure of either homologous chromosomes to separate during meiosis I or sister chromatids to separate during meiosis II is called ________
Fill in the blank(s) with correct word