Diffusion of morphogens influence the differential expression of other genes such as __________, which govern the
formation of specific body parts. Fill in the blank(s) with the appropriate word(s).
ANSWER: homeotic genes
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Blanks "C" and "D" should be labeled respectively _____
a. in; large b. in; small c. out; large d. out; small e. in; equal
In 1997, a gene called Le was discovered by two research groups led by David Martin and Diane Lester. Allelic variation in the Le gene, which controls elongation of the plant stem between branches, is responsible for which trait in peas?
A) inflated and constricted pod shape B) yellow and green pod color C) purple and white flowers D) tall and short plant height E) axial and terminal flower position
Which of the following phyla is the most diverse and numerous?
A) The chordates B) The cnidarians C) The echinoderms D) The arthropods
Choose the one most appropriate answer for each.
A. hominins B. Neanderthals C. primates D. anthropoids E. Strepsirrhini F. australopith G. hominoids