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Genetics
key terms
| Term | Definition |
|---|---|
| chromosomes | DNA and protein, consists of a series of genes |
| genes | Part of a chromosome that controls the development of a particular characteristic |
| DNA | What chromosomes are made of |
| alleles | Alternative format of the same gene |
| dominant allele | Allele that will show even when paired with a recessive allele |
| recessive allele | Allele that is only shown when no dominant allele is present |
| homozygous | The same alleles in a genetic pair |
| heterozygous | Different alleles in a genetic pair |
| Punnett square | The grid used to show Monohybrid inheritance |
| Clone | An individual that is genetically identical to its parent |
| Diploid | A cell that contains two copies (pairs) of each chromosome |
| Ethics | The study of right and wrong and what people should and should not be allowed to do |
| Gametes | Sex cells: sperm and eggs |
| Genetic engineering | Technology involving moving genes from one organism to another, within or between species |
| Genotype | Genetic identity of an organism |
| Haploid | A cell containing one copy of chromosomes |
| Infertility | The inability to reproduce |
| Inheritance | The passing on of features through reproduction |
| In Vitro Fertilisation | Technique to fertilise an egg in artificial conditions outside the female's body |
| Meiosis | The type of division in a cell's nucleus that produces gametes (Sex cells) |
| Mitosis | Type of division in a cell's nucleus that produces new diploid cells for growth or to replace damaged cells |
| Monohybrid inheritance | Genetic inheritance of one characteristic eg eye colour |
| Mutation | A spontaneous change in the genetic material of a cell |
| Nucleus | Part of the cell that contains the chromosomes |
| Ovum | An egg cell |
| Phenotype | The physical expression of the genes an individual possesses eg brown eyes |
| Transgenic | An organism whose genome has received a gene/genes from another organism |
| Variation | The differences between organisms of the same species |
| Carrier | An individual who carries a 'faulty' allele but does not suffer from the condition caused by the faulty allele |
| Genome | All the genetic material of an organism |
| Human Genome Project | International project that set out to establish the sequence of all the bases in the genes of all 23 pairs of human chromosomes |
| Speciation | The process of evolution by which new species are formed |