Offspring resmeble their parents because they conain genetic information passed onto them by their parents.
Chromosomes and genes
- Chromosomes, found in the cell necleus contain many genes.
- A gene is a section of DNA, which carries coding for a particular protien.
- Different genes control the development of different characterisitcs of an organism.
- Many genes are needed to carry all the genetic information for a whole organism.
Number of genes and chromosomes varies from species to species. Humans have 46 choromoes that carry around 30,000 genes in each cell.
Genetic Factors
Although individuals of a species look similar, they are not usually idenitical these differences are calling variation.
Inherited Variation
Variation due to genetic causes is inherited variation...
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