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196418
Evolution
Description
Biology Mind Map on Evolution, created by vina_56 on 07/09/2013.
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biology
biology
Mind Map by
vina_56
, updated more than 1 year ago
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Created by
vina_56
over 10 years ago
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vina_56
over 10 years ago
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over 10 years ago
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vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
vina_56
over 10 years ago
Copied by
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Resource summary
Evolution
Evolution
plants - make own food
animals move & can't make own food
microorganism - single-celled
Natural Selection
variation - genes
better adapted = better chance of survival = reproduce - passed onto next generation
Mutations - change in DNA
could be beneficial - useful characteristic = better chance of survival/reproducing
accumulate e.g bacteria - resistant to antibiotics
Darwin - not all agreed
religious beliefs - God
Lamarck - acquired characteristics = passed onto offspring
Genetic Engineering
Enzymes - cut and paste Genes
useful gene - 'cut' - using enzymes
enzymes - cut another chromosome & insert useful gene
bacteria can produce human insulin
Genes - Transferred into Plants & Animals
transfer useful genes at early stage = useful characterictics
Genetically modified crops - resistant to viruses, insects, herbicides
Genetic disorders - inserting working genes - gene therapy
affect no. of weeds/flowers, insects - reducing farmer biodiversity
transplanted genes - into natural environment - herbicide resistance picked up weed = new 'superweed'
increase yield
lack of nutrients - engineering could add that nutrient
Cloning
Cuttings & Tissue Culture
take cuttings from good parent plants = genetically identical copies - quick & cheap
tissue culture - few plants cells put in growth medium with hormones - grow into new plants - clones - quick, little space, grown all year
Animal Clones - Embryo Transplants
sperm & egg cells - best cow & bull - artificially fertilise - embryo split = clones cloned embryos - implanted into other cows
Adult Cell Cloning (Dolly)
removing genetic material (nucleus) from egg cell - complete set of chromosomes from adult body cell inserted into empty cell
electric shock - to split up
implanted into adult female
'reduced gene pool' - no resistance to disease
study - more understanding of embryo - ageing & age-related disorders
endangered species
may not be as healthy - Dolly had arthritis - occurs in older sheep anyway
Media attachments
cloning.gif (image/gif)
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