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Download Genetics Unit: 1. Heredity- the passing of traits from parent to young
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Genetics Unit: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Heredity- the passing of traits from parent to young Genetics- branch of Biology that studies heredity Genes- factors that control traits Genotype- genetic makeup (ex. TT, Tt or tt) Genotypic Ratio- the proportion of genotypes for a particular parental cross Traits- specific characteristics that vary from one individual to the next Alleles- different forms of a gene Dominant- effects of these genes are seen even when 2 different alleles are present Recessive- form of a gene not expressed when paired with a dominant allele; only shows when another recessive allele is present Phenotype- physical characteristics (ex. tall or short) Phenotypic Ratio- the proportion of phenotypes for a particular cross Homo or Homeo- same Homozygous- organism that has 2 identical alleles for a trait (ex. TT or tt) Hetero- different Heterozygous- organism that has 2 different alleles for a trait (ex. Tt) Pedigree- chart that shows the relationships within a family Karyotype- picture of an organisms chromosomes Sex-Linked Traits- genes found only on the X chromosome and not on the Y Co-Dominance- when both alleles of a gene contribute to the phenotype Incomplete Dominance- when one allele is not completely dominant over another allele; it produces offspring with a third phenotype, that is a blending of the parental traits