Biology B23-24

Molly Munyard
Mind Map by , created over 5 years ago

GCSE Science (Biology) Mind Map on Biology B23-24, created by Molly Munyard on 03/13/2014.

Molly Munyard
Created by Molly Munyard over 5 years ago
The Digestive System
Key Biology Definitions/Terms
Plant and animal cells
Life in Germany
Ben C
History - Treaty of Versailles
Key Biology Definitions/Terms
Biology -B2
Sian Griffiths
Biology -B2
Key Biology Definitions/Terms
jane zulu
B3- Science. Cells, Genes and Enzymes.
Biology B23-24
1 Characteristics
1.1 Determined by...
1.1.1 Genes Eye colour Nose shape Ear lobe shape
1.1.2 The environment Scars Learning to speak a language
1.1.3 Genes and the environment Intelligence Height Body mass
2 Chromosomes
2.1 inside the nucleus of every cell
2.2 Each body cell...
2.2.1 23 matching pairs of chromosomes 1 member of each pair from dad-sperm 1 member of each pair from mum-egg
2.3 contain genes
2.3.1 Contain coded information The codes control different characteristics of the body
3 Reproduction
3.1 Sexual reproduction
3.1.1 different gametes Different sex cells Sperm-dad Egg-mum
3.1.2 Each gamete-half the number of chromosomes Female-egg 1 produced each month Male-Sperm Hundreds made each day Each sperm nucleus contains 23 chromosomes
3.1.3 Fertilisation One sperm will fertilise one egg Two nuclei fuse together The chromosomes from each parent pair up
3.1.4 The result is a new individual with a mix of genetic information This is why offspring have genetic variation
3.2 Asexual reproduction
3.2.1 Only one parent is needed
3.2.2 No gametes
3.2.3 No mixing of genetic information No genetic variation Offspring are genetically identical to their parent
3.3 Cuttings
3.3.1 genetically identical plants
3.3.2 Advantages Quick and cheap Genetically identical to the parent Will have the parent's desirable characteristics

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