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Genetics
Chapter 10
| Term | Definition |
|---|---|
| Genetics | scientific study of heredity |
| Fertilization | process of diffusion in which male and female reproductive cells join to form a new cell |
| Trait | specific characteristic of an individual |
| True-Breeding | having two identical alleles for a particular gene (same as homozygous) |
| Hybrid | offspring of crosses between parents with different traits |
| Segregation | separation of alleles during gamete formation |
| Independent Assortment | one of Mendel's principles that states that genes for different traits can segregate independently during the formation of gametes |
| Gametes | sex cell |
| Homozygous | having two identical alleles for a particular gene |
| Heterozygous | having two different alleles for a particular gene |
| Phenotype | physical characteristics of an organism |
| Genotype | genetic makeup of an organism |
| Dominant | an allele that hides the presence of another allele |
| Recessive | an allele that is hidden by the presence of another allele |
| Allele | one of a number of different forms of a gene |
| Incomplete Dominance | situation in which one allele is not completely dominant over another allele |
| Codominance | situation in which the phenotypes produced by both alleles are completely expressed |
| Punnet Square | diagram that can be used to predict the genotype and phenotype combinations of a genetic cross |
| Multiple Allele Trait | a gene that has more than two alleles |
| Polygenic Trait | trait controlled by two or more genes |
| Sex-Linked Trait | gene located on a sex chromosome |
| Carrier | a carrier of the gene; disease is not shown but can be passed to next generation |
| Autosome | chromosome that is not a sex chromosome; also called autosomal chromosome |