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Variation/Genes/Inheritance/Classification (Inheritance (Some…
Variation/Genes/Inheritance/Classification
Genes
Characteristic features can be inherited (from our parents) or caused by our enviroments
Environmental causes (eg weight)
Diet
Climate
Accidents
Culture
Lifestyle
Continous varitation
This be any value (eg. height)
Discontinous
grouped (Eye colour)
Inheritance
Some characteristics are dominant, and some are recessive. You can tell what a characteristic is like by studying the results of breeding experiments.
In humans and other mammals, gender is controlled by a pair of sex chromosomes. Females have two X chromosomes, XX. Males have one X and one Y chromosome, XY.
Classification
The first big division of living things in the classification system is to put them into one of five kingdoms. These are based on what an organism's cells are like. The table shows the names of the kingdoms and examples of the sort of organisms they contain.
Plants
All green plants
Animals
Mammals
Amphibia
Fish
Reptiles
Birds
Molluscs
Athropods
Fungi
Moulds
Yeast
Mushrooms
Prokaryotes
Bacteria
Blue-green algae
