Maternal effect genes of Drosophila are genes active in __________ cells, whose products establish
__________ in developing embryos.
a. maternal; gender
b. maternal; polarity
c. embryonic; polarity
d. embryonic; gender
e. egg; gender
B
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What is required for a group of clones to be considered a contig?
A. the clones need to have nonoverlapping regions of DNA. B. the clones should contain identical regions of DNA. C. the clones should contain completely unique regions of DNA. D. the clones should have overlapping regions of DNA. E. the clones should have identical, nonoverlapping regions of DNA.
In ____ immunity, the response is immediate, the antigen is detected by a fixed set of receptors, and the response does
not persist.
a. innate b. adaptive c. antibody-mediated d. cell-mediated e. autoimmunity
A eukaryotic gene is observed to make multiple forms of a protein. How can one eukaryotic gene produce multiple products in the same cell?
A) Alternative splicing sites can lead to the production of two different mature mRNAs from the same gene, resulting in slightly different proteins. B) Epigenetic changes can change the sequence of amino acids in a protein. C) Translation rates can affect the length of the polypeptide made from the same mRNA. D) Silencer genetic elements can cause early termination of transcription, leading to the production of multiple mature mRNAs from the same gene. E) One gene equals one protein, so this observation must be incorrect.
In all symbiotic relationships, both species involved benefit from the association
Indicate whether the statement is true or false