Aim: Why do different cells produce different proteins?

LO: SWBAT understand why different cells produce different proteins

DN: h/0 genetic disorders

HW: review questions- genetics

Test Wednesday- genetics

Do all the cells in your body have the same DNA?

YES!!!

they all came from a single cell which

replicated its DNA

Body Cells

Although every cell in your body has the same DNA, not all cells are the SAME. Why?

Gene Expression

different cells EXPRESS different

portions of the genetic code (genes).

Gene Expression

Though all genes of the genome are present in every type of cell, only a small, specific

fraction of these genes are actually expressed in each type of cell.

Genes that are beingexpressed are “on”

How does a gene express itself?

Making Protein

The Information on DNA

(expressed genes) is

Translated Into proteins which Determine the

organism’s traits.

Environmental Effect

Environmental factors such as temperature, pH, and availability of nutrients can influence the genes expressed in a cell.

Examples:

Himalayan Rabbits

Hydrangea

If a small section of fur is shaved from a Himalayan Rabbit, the fur will grow back

either white or black depending on the temperature of its environment.

GENES + ENVIRONMENT = TRAITS

Express the following gene: GGCTTAACGTAC

mRNA codon