One of a pair of chromosomes contains the genes carried on the sex chromosomes, i.e. X and Y that helps determine the sex of an individual, e.g. in chromosomes. They are transmitted together so the humans XX = female, XY = male. The X chromosome phenotype is related to the sex of the individual. is longer than the Y chromosome. Examples of such genes are those controlling haemophilia and red/green colour-blindness in humans. sex chromosome sex-linked / sex-linkage Group of animals or plants that can interbreed and Simple (unspecialised) cell from which specialised cells produce viable, fertile offspring. Members of these will develop. groups share the same characteristics and differ only in minor details. Each member of a group is unique. species stem cell One of the nitrogenous bases found in DNA a pyrimi- – Character or distinguishing feature of an organism, e.g. dine. Known by the abbreviation T. eye colour, height, sex, etc. thymine trait / characteristic The making of RNA from a single strand of DNA. An organism whose genetic content has been changed by adding a gene by genetic engineering. transcription transgenic organism
One of a pair of chromosomes contains the genes that helps determine the sex of an individual, e.g. in humans XX = female, XY = male. The X chromosome is longer than the Y chromosome. sex chromosome carried on the sex chromosomes, i.e. X and Y chromosomes. They are transmitted together so the phenotype is related to the sex of the individual. Examples of such genes are those controlling haemophilia and red/green colour-blindness in humans. sex-linked / sex-linkage Group of animals or plants that can interbreed and produce viable, fertile offspring. Members of these groups share the same characteristics and differ only in minor details. Each member of a group is unique. species Simple (unspecialised) cell from which specialised cells will develop. stem cell One of the nitrogenous bases found in DNA – a pyrimi- dine. Known by the abbreviation T. thymine Character or distinguishing feature of an organism, e.g. eye colour, height, sex, etc. trait / characteristic The making of RNA from a single strand of DNA. transcription An organism whose genetic content has been changed by adding a gene by genetic engineering. transgenic organism
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