Genes, Inheritance, & Traits Notes

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

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

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

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

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

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

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

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.

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

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

http://www.ncbi.nlm.nih.gov

CREATE A FLOW MAP Click on the link. http://news.bbc.co.uk/hi/english/static/in_depth /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.)

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