GENE EXPRESSION AND DEVELOPEMENT

In a developing zygotes there are certain genes that are expressed as cells as cells perform different tasks to grow and develop.

HOMEOTIC GENES

• Regulatory genes that determine where certain structures develop.
• They determine the overall body organization.

HOMEOBOX SEQUENCES

• A specific DNA sequence with a homeotic gene.
• Home oboes control a specific part of an organism
• They have specific codes for an organisms anatomy.

TRACKING CHANGES IN GENE EXPRESSION

• Gene expressions can be tracked with a DNA chip.
• DNA chips contain a microscopic grid with thousands of DNA fragments.