Animal Developmental Patterns · Zoology

In Drosophila, 'Homeotic (Hox) genes' are responsible for:

  1. Establishing the initial polarity of the egg
  2. Determining the identity of specific segments
  3. Dividing the embryo into 14 parasegments
  4. Determining the sex of the embryo at fertilization
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Correct answer: Determining the identity of specific segments

Hox genes specify the structures that grow on each segment (e.g., legs, wings, or antennae). Mutations in these genes, such as Antennapedia, can cause legs to grow where antennae should be.

Difficulty: Medium Question 17 of 20

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