1. Genes, Inheritance, & Traits Notes

2. What is GENETICS?
The study of how traits are inherited through the interactions of genes.

3. Traits of species
We learned in class that our physical features come from our parents. We inherit these traits and they are in our DNA.
Eye color
Hair color
Height

4. Heredity & Traits Genetic Not
Heredity is the passing of traits from parent to the offspring (or baby).
Traits are a way of looking, thinking, or being. If they are genetic traits, they are passed down through the genes from a parent.
Genetic
Not

5. What is DNA? The scientific name for DNA is Deoxyribonucleic acid
The material inside the nucleus of a cell that contains the genetic code

6. What is a GENE?
A code made up of pairs of bases carried on the DNA molecule.
Passes information from one generation to the next.
Each DNA molecule contains many genes
The basic physical and functional units of heredity

7. GENE Each chromosome carries a couple of thousand genes
Many of these are common to all human beings.
So, 99.9% of your DNA is identical to everyone else's

8. GENE The remaining 0.1% influences the differences between us
height, hair color and susceptibility to a particular disease
Environmental factors, such as lifestyle (for example, smoking and nutrition) also influence the way we look and our susceptibility to disease

9. DNA makes up a GENE which are located within CHROMOSOMES in the NUCLEUS of a CELL.
***WRITE the sentence above then DRAW and LABEL the picture in your journal to help explain the sentence.

10. What are CHROMOSOMES? A packet of coiled up DNA
Humans have 23 pairs of chromosomes
You get half from your mother and half from your father.
They are in the nucleus of cells

11. CHROMOSOMES
There are 23 pairs of chromosomes in the nucleus of any one of your cells
Each chromosome has a single strand of DNA, which carries the code for a couple of thousand genes

14. CREATE A FLOW MAP Click on the link.
/sci_tech/2000/human_genome/stage_5.stm
Click on each number (#1-#6).
Read the information on each number.
Create a FLOW MAP that shows the progression from DNA to cell. (example on next slide)
**Your flow map must include descriptions under each box
Start with the smallest and end with the largest.
(Your flow map will diagram the information found on slides 9-13.)

15. Example of a flow map
organ cell organ tissue organ organ system organism **Your flow map must include descriptions under each box