Inheritance, Classification and Variation

Discontinious Variation
1. The feature is in categories
  1. like blood group
Continious variation
1. The feature can vary over a range of values
  1. like shoe size
Variation is just the differences between organisms
1. Environmental
  1. Environmental variation is variation affected by the environment
  2. Plants vary environmentally by:
    1. Temperature
    2. Moisture
    3. Sunlight
    4. Soil Conditions
2. Inherited variation
  1. These are from our genes
Inheritance and Selective Breeding
1. Selective Breeding is where humans choose animals and plants with favourable characteristics. They then allow these plants to reproduce.
  1. Humans usually benefit from selective breeding
  2. Plants and animals developed by selective breeding
    1. Winter Wheat is disease and frost resistant
    2. Pedigree Dogs are bred for intelligence or behavior and fashion
    3. Domestic livestock is bred for produce farmers have been doing this for years without even realising.
2. Inheritance is the characteristics you get when your parents egg and sperm fuse together
  1. Human cells have 46 chromosomes in
    1. The sperm cell and the egg cell each have 23 chromosomes which when fused together during fertilisation a mixture of the parents characteristic will develop
Classification
1. Living things can be classified into groups
  1. These groups are Plants Animals and Fungi
  2. Vertabrate is an animal with a backbone
  3. Invertabrate an animal with a backbone

Resource summary

	Created by Cassie Cox over 11 years ago