Chapter_3_HD
Download
Report
Transcript Chapter_3_HD
Chapter 3 HD
Biological Beginnings
Genetics
The study of how traits are passed from
one generation to the next
Each body is made up of billions of
cells
Each cell contains 46 chromosomes
(except the reproductive gametes have 23)
Each chromosome contains genes
Genes are laid in rodlike pairs side by side
and called chromosomes (one gene from
mom; one from dad)
Each gene contains long sequences of DNA
(a ladder-like, spiral staircase structure that
forms the genes)
Genoid Activity
Chromosomal Abnormalities
Down Syndrome
Klinefelter Syndrome/Turner Syndrome
Prader-Willi Syndrome
Angelman Syndrome
Genetic Defects
Neurofibromatosis-tumors in the central
nervous system
Huntington Disease-progressive CNS
Phenylketonuria (Celtic people)
Sickle Cell Disease (African descent)
Tay-Sachs (Jews from eastern Europe)
Thalassemia (Greek/Italian)
Duchenne Muscular Dystrophy
Avoid Harmful Substances
Alcohol
Nicotine
Marijuana
Cocaine
Heroin
HIV/AIDS-children may get the virus from
the mother
Next meeting:
We will look at genetic defects in children
Read Ch. 3 in Miller and Sammons