The regulation of gene expression in individual cells coordinates the development of multicellular organisms, ensuring that tissues and organs form in their characteristic places. researchers can study how multicellular organisms develop their spatial organization by examining normal and mutant forms of organisms, such as the fruit fly, drosophila.
select the four statements that are true.
1. homeotic genes establish major body axes.
2. cells receive molecular signals that communicate their position in relation to other cells.
3. differential gene expression affects the developmental process in animals.
4. pattern formation begins in adult animals.
5. homeotic genes code for transcription factors that control the development of segment-specific body parts.
6. positional information controls pattern formation.
7. the process of pattern formation involves segmentation of the body but does not involve the development of segment-specific body parts.