Which of the following statements about pattern formation aretrue? Select the four statements that are true.

1) Homeotic genes code for transcription factors that controlthe development of segment-specific body parts.

2) Homeotic genes establish major body axes.

3) Cells receive molecular signals that communicate theirposition in relation to other cells.

4)Differential gene expression affects the developmental processin animals.

5)Pattern formation begins inadult animals.

6)The process of patternformation involves segmentation of the body but does not involvethe development of segment-specific body parts.

7)Positional information controlspattern formation.