Environmental - this refers to variation caused by the world around an organism., Genetic - this refers to variation caused by the genes an organism has., Variation - this word means the difference between individuals of the same species., Natural - This type of selection is the driving force behind evolution., Evolution - This describes how new species are formed by gradual changes over many generations., Inheritance - this describes the genes you get from your mum and dad., DNA - This is the chemical in our bodies that stores your genetic code., Genes - these are lengths of DNA that code for a particular characterisitc., Nucleus - This is the part of a cell that stores the DNA., Egg - This is the name for the female sex cell., Sperm - This is the name of the male sex cell., Gamete - This is the scientific name for sex cells., Fertilisation - This describes when a sperm and egg cell fuse together., Characteristics - these describe the traits an organism posesses., Identical - these types of twins have matching DNA., Darwin - this is the name of the scientist that proposed the idea of evolution., Extinction - this describes the complete loss of a species from an area., Biodiversity - this describes the whole range of living things that can be found in an area., Species - this describes individuals that can breed together to produce fertile offspring., Independent - this type of variable is the one we deliberately change in experiments., Dependent - This variable is the variable we deliberately measure in an experiment., Control - this type of variable is kept the same during an experiment to ensure your results are reliable., Chromosomes - these describe long coils of DNA that contain many genes,, there are 23 pairs of these in humans., Offspring - The scientific name for an organisms children. ,

Junior cert Genetics

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