Zusammenfassung der Ressource
Unit A
- Reproduce
- Asexual
- Budding
- vegative reproducion
- spore production
- binary fission
- splitting of 2 cell
- same DNA
- mitosis
- produce 2 new cells with the same number of chromosomes
- example: cell repair.
- Sexual
- Divided DNA
- half DNA egg cell/ sperm cell
- meiosis
- produces cells with only half the normal DNA
- Cell
- egg cell
- spream cells
- flization
- egg cell meets the sperm cell
- gamete
- Embroy
- when the baby forms
- cleveage
- 1st division of a cell
- zgato
- babys cells muiplys
- DNA
- classifying species
- kingdom, phylum, class, order, family, genus, species
- Ecosystems
- population
- commuity
- species
- niche
- organism role
- paralism
- one benefits one is harm.
- commistlism
- one benfits one is not harmed or benfits
- mutalism
- they both benefits
- symbiosis
- association of members of different species
- DNA
- contuios
- range of forms
- discete
- has or not
- heritable
- passed down
- non-heritable
- not passed down
- deoxyribonucleic acid
- Genetic code
- based on arranging the
four chemical letters into
words or instructions
- guanine (orange)
- cytosine (blue)
- adenine (green)
- thiamine (violet)
- Chromosomes: package
of DNA
- humans have a complete set of 46
chromosomes
- gene
- an single untouched segment of DNA
- alleles
- a dog can be used as an
example for gene, alleles and
chromosomes
- Traits
- Purebred
- example - an cat that has RR or rr alleles
- hybrid
- produced by crossin 2 purebeds ( Rr or rR)
- Dominant traits
- trait always shows through
- Recessive traits
- not physcailly expressed by offspring
- incomplete dominance
- when a dominant allele is not fully completed and mix with the recessive allele
- human effect on envoirment
- extinction
- the disappearance of every individual of an specie
- reasons for extinction:: natural disaster, lack of resources ,to much
hunting, people built on there land
- extirpation
- an local extinction
- overspecialization
- adapte to much to one community cant live any where else
- non-native species
- an specie that from somewhere else
- Selecting
- artificial selection
- selecting and breeding and individual with desirable traits
- biotechnology
- changing the genetics of a specie
- cloning
- take the DNA from one plant and making an identical plant
- in vitro fertilization
- take spream from male bull. taking egg cell from female cow. create embryos and implantin different cows
- artificial insemination
- spream harvested and implant into muitpal cows
- advantage spream can be in many different places at one time
- genetic engineering
- technology that directly alters the DNA