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Genetics
Vocabulary words for 7th grade genetics.
| Term | Definition |
|---|---|
| Heredity | The passing on of physical or mental characteristics genetically from one generation to another. |
| Hybrid | The offspring of two plants or animals of different species or varieties. |
| Purebred | An animal bred from parents of the same breed or variety. |
| Trait | A genetically determined characteristic. |
| Offspring | An animal's young or a plant's sapling/seed. |
| Gene | A unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring. |
| Alleles | One of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome |
| Dominant | Most important, powerful, or influential. |
| Recessive | Relating to or denoting heritable characteristics controlled by genes that are expressed in offspring only when inherited from both parents, i.e., when not masked by a dominant characteristic inherited from one parent. |
| Homozygous | Pair of matching alleles, which are the two genes that control a particular trait. |
| Heterozygous | Pair of genes where one is dominant and one is recessive — they're different. |
| Genotype | The genetic constitution of an individual organism. |
| Phenotype | The set of observable characteristics of an individual resulting from the interaction of its genotype with the environment. |
| Meiosis | A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores. |
| Haploid | (of a cell or nucleus) Having a single set of unpaired chromosomes. |
| Diploid | (of a cell or nucleus) Containing two complete sets of chromosomes, one from each parent. |
| Mutation | The changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes/chromo. |
| Insertion | The addition of one or more nucleotide base pairs into a DNA sequence. |
| Deletion | Which a part of a chromosome or a sequence of DNA is missing. |
| Subsitution | Type of mutation where one base pair is replaced by a different base pair. The term also refers to the replacement of one amino acid in a protein with a different amino acid. |
| Sex-Linked | Tending to be associated with one sex or the other. (of a gene or heritable characteristic) carried by a sex chromosome. |
| Carrier | A person or other organism that has inherited a genetic trait or mutation but does not display that trait or show symptoms of the disease. |
| Sex Chromosomes | A chromosome involved with determining the sex of an organism, typically one of two kinds. |
| Genetic Disorders | An illness caused by one or more abnormalities in the genome, especially a condition that is present from birth (congenital). |
| Pedigree | A diagram of the genetic relationships and medical history of a family using standardized symbols and terminology. |
| Selective Breeding | Is the process by which humans breed other animals and plants for particular traits. |
| Inbreeding | Breed from closely related people or animals, especially over many generations. |
| Hybridization | Is the process of combining two complementary single-stranded DNA or RNA molecules and allowing them to form a single double-stranded molecule through base pairing. |
| Clone | An organism or cell, or group of organisms or cells, produced asexually from one ancestor or stock, to which they are genetically identical. |
| Genetic Engineering | The deliberate modification of the characteristics of an organism by manipulating its genetic material. |
| Gene Theropy | The transplantation of normal genes into cells in place of missing or defective ones in order to correct genetic disorders. |