Gap genes of Drosophila embryos:a. organize the embryo into broad regions and influence the ...

Gap genes of Drosophila embryos:a.
   organize the embryo into broad regions and influence the activity of pair-rule genes.
  b. are missing from the chromosomes of mutant flies.
  c. are genes that have moved to gaps on other chromosome during meiosis.
  d. cause gaps in the cell cycle.
  e. cause the death of embryos before they hatch.

Question 2

The first active Drosophila segmentation genes are the ____, which begin organization of the body into regions.
  a. pair-rule genes
  b. segment polarity genes
  c. gap genes
  d. homeotic genes
  e. maternal effect genes