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Science 8

What do genes contain? Hereditary information
What are genes made up of? DNA
Where do cells store DNA? In the chromosomes in the nucleus.
How are traits passed on? from generation to generation
Where do genes come from in asexual reproduction? A single parent. (They are genetically identical to the parent.)
Where do genes come from in sexual reproduction? Half of the genes come from each parent.
Selective breeding people select plants or animals that have specific traits and breed them together
How is the probability of traits being passed on determined? Punnett squares and pedigree charts
digestive system breaks down food into molecules that can be absorbed into cells
chemical breakdown stomach acid and saliva
mechanical breakdown chewing/grinding by the teeth
Respiratory system supplies oxygen and removes carbon dioxide
what do cells use oxygen to do? release energy stored in food
Excretory system disposes of dissolved waste and removes excess heat energy
nervous system controls bodily functions like breathing.
endocrine system controls body functions (growth and development) by making hormones
reproductive system makes sex cells necessary for production of offspring
female sex cell egg
male sex cell sperm
immune system special cells that protect the body from disease
disease breaks down the structures or functions of an organism
Created by: carozza