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Science Ch. 5 & 6

Heredity parents giving traits to their children
Allele traits making gene pairs
genetics the study at what you get from your parents
hybrid a mxture of two different traits (cross-bread)
dominant the trait that always is going to show up if it is present
recessive will always be covered up unless they are with the same kind
punnett square a tool to predict the chance of having a paticular trait
genotype the traits or the genetic info
phenotype physical traits you can see
homozygous the same trait of allele- AA, aa
heterozygous when the alleles are not the same size- Aa
incomplete dominance production of a phenotype that is intermediate between the two homozygous parents
multiple genes occurs when a group of gene pairs act together and produce a specific trait, such as human eye color, skin color, or height
sex-linked gene an allele inherited on a sex chromosome an that can cause human genetic disorders such as color blindness
genetic engineering biological and chemical methods to change the arrangment of a gene's DNA to improve crop production, produce large volumes of medicine, and change how cells perform their normal functions
species group of organisms that share similar charectaristics and can reproduce among themselves creating a healthy offspring
evolution change in inherited charectaristics over time
variation inherited trait that makes an individual different from other members of the same species and results from a mutation in the organisms genes
natural seletion a process by which organisms with traits best suited to their enviroment are more likely to survive and reproduce
adaptation any variation that makes an organism better suited to its enviroment
gradulism model describing evolution as a slow process by which one species changes into a new species through a continuing series of mutations and variations over time (1000s of years)
punctuated equilibrium model describing the rappid evolution that occurs when a mutation of a few genes result in a species suddenly changing into a new species (100s of years)
sedimentary rock a type of rock most likely to contain fossils and sand, silk, or mud coprised and cemented together
radioactive element element that gives off a steay amount of radiation as it slowly changes to a nonradioactive element
embryology study of embroys and their development
homologous body parts thar are similar in structure and orgin and can be simlar in function
vestigal structure structure, such as the human appendix, that doesn't seem to have a function but may have once functioned in the body of an ancestor
what did mendel do? he discovered how traits are passed on by using pea pods
what are the four points of natural selection 1. The organism must be able to reproduce 2. the organism must be sucesessful 3. the organism must have variations 4. the organism must be populated ( Please Race Very Speepy )
what are the two types of evoluton? gradulism and puntuated equilibrum
what are the five pieces of evidence that evolution occurs? 1. fossils 2. DNA 3. embrology 4. vestigal structures 5. homologous
what are the three points to primates 1. opposable thumb 2. binocular vission 3. flexible shoulders and rotating forelimbs
what are hominids? human like primates that ate meat and vegtables and walked up right on two feet
Who was Lucy? was the southern ape and was the oldest ape fossil recorded that walked upright
Compare and contrast Neanderthals to Cro Magnon Neanderthal - short Cro Magnon - tall Neanderthal - lived outside Cro Magnon - lived in caves
Created by: david0