In Drosophila, which type of genes are controlled by maternal gene products laid down in gradients in the egg?
A) segment polarity genes
B) pair-rule genes
C) gap genes
D) all genes are controlled by maternal gene products
Answer: C
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A mutant protein has been designated as G189A. What does this designation reveal about the mutation?
A. That a G nucleotide has been exchanged for an A nucleotide 189 bases from the 5' end of the coding region. B. That a glycine in position 189 of the protein is now an alanine. C. That an A nucleotide has been exchanged for a G nucleotide 189 bases from the 5' end of the coding region. D. That a glycine is now in position 189 of the protein instead of an alanine. E. That a nonsense mutation occurred at position 189 of the protein.
Describe three genetic mechanisms whereby proto-oncogenes can become overexpressed
What will be an ideal response?
Usually growth of cells that do not pose a threat to surrounding tissues are termed
a. malignant. b. benign. c. metastatic. d. carcinogenic.
Immunity acquired by transplacental transfer is called __________.
A) artificially acquired active immunity B) artificially acquired passive immunity C) naturally acquired passive immunity D) naturally acquired active immunity