Compare the functions of maternal effect genes, segmentation genes, and homeotic genes in Drosophila
What will be an ideal response?
ANSWER: Maternal effect genes are expressed in the mother and the transcripts are stored in the egg in patterns that dictate the polarity of the developing embryo (anterior-posterior and dorsalventral). Segmentation genes are responsible for subdividing the embryo into particular regions. Homeotic genes specify what each segment will become by regulating the development of structures such as wings, antennae, legs, and eyes on particular segments.
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The presence of a group of antigens that determine blood type is an example of a(n) ____________
A. semilethal allele B. sex-linked trait C. multiple allele system D. incomplete dominance
Jupiter was probably influential in preventing the formation of a planet at the present location of the asteroid belt
a. True b. False Indicate whether the statement is true or false
____ are multicelled projections that protrude
from the lining of the small intestine.
a. Sphincters b. Brush borders c. Microvilli d. Villi e. Macrovilli
Which term describes a fever lasting 3-10 days followed by a non-fever state of similar length?
A) relapsing fever B) remittent fever C) sustained fever D) Pel-Ebstein fever E) intermittent fever