variation and evolution Flashcards
what influences how we look
genes
environment
who created the theory of natural selection
Charles Darwin
how do you transfer one gene to another
isolate the gene we want then cut it out using enzymes we then transport it into a vector like a virus or bacteria plasmid and then introduce the vector into the organism
what is genetic engineering
transferring one part of DNA into another
cloning animals
take an egg cell from an donor and separate the nucleus then take and cell from an adult body cell then remove the nucleus take the nucleus from the adult body cell and put it in the egg give it an electric shock to stimulate growth into an embryo then put it in an uterus
advantage of cloning than selective breeding 3
faster
identical
more offspring
how does plant cloning work
cut of an part from an plant it give it some hormones like auxin
come back to this2 method of plant
cut up a plat and sterilises it then plant it into a plant medium contain nutrients then plant it into the soil
who made the theory of inheritance
mendel
who made the stupid theory
lamrack
who made the theory of natrual selection
wallace and darwin
3 reasons why natural selection wasn’t accepted
religious
lack of evidence
dna hadnt been discovered
define species
genetically similar offsprings that can interbreed and make fertile offsprings
explantion for speciation
two species are isolated the ones that are better adapted for there habitat survive and pass the desirable trait to their offspring the species become so different they can no longer interbreed and make fertile offspring
3 types of fossils
impressions
mineral replacement
preservation
