Science Topic 3 Definitions 2011
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Alles | The alternative forms of each gene
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| Chromosome | A length of DNA, containing many genes
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| Dominant | The one of a pair of opposite characteristics that appears when both are inherited
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| Gametes | The sex cells - sperm and ova
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| Genetics | The study of inheritance and variation and the factors controlling them
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| Heredity | Passing on characteristics from one generation to the next
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| Heterozygous | Different alles for a gene
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| Homozygous | 2 of the same alles for a gene
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| Meiosis | Cell division resulting in daughter cells with half the chromosome number of the parent cell. (Makes the sex cells)
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| Mendel | An Austrian monk who carried out experiements on pea plants - the father of genetics
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| Mitosis | Cell division resulting in 2 daughter cells, each an exact copy of the parent cell
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| Mutation | Results when a mistake is made in copying of DNA
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| Phenotype | How living things appear and function
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| Recessive | Appearing in offspring only when not masked by a dominant characteristic
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| Zygote | The 1st cell of the new individual, formed when a sperm fuses with the ova during fertilisation
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| Unicellular | An organism which only has 1 cell
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| Multicellular | An organism with more than 1 cell, encompassing all familiar plants and animals
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| Karyotyping | Process of sorting chromosomes into their matched pairs
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| Heterozygous | Different alles
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| Homozygous | Same alles
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| Genotype | Combination of genes that determine a phenotype
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