inheritance key terms

• what is meant by a gene


  a sequence of DNA bases that codes for a particular polypeptide
• what is meant by a locus


  the particular region that the gene occupies on a chromosome
• what is an allele


  alternative forms of a particular gene , coding for an altered phenotype
• what is a genotype


  the genetic makeup of an individual(all the alleles they posses)
• what is a phenotype


  the observable characteristics of an organism determined by the genotype
• what is meant by dominant


  this is a form of allele of which will always be expressed in the phenotype
• what will the dominant allele be shown by


  the use of a capital letter
• what is meant by recessive


  this is a form of an allele that will only be expressed when it is with another recessive allele
• what is meant by homozygous


  two of the same allele
• what is meant by heterozygous


  two different alleles
• what is a mono-hybrid


  this is the inheritance of a single gene
• What is a dihybrid?


  this is the inheritance of two genes
• what is meant by co-dominance


  this is when both alleles of the gene are expressed
• give an example of co-dominance


  AB blood type and animals with different sections of coloured fur
• what is meant by incomplete dominance


  the phenotype of the heterzygote is intermediate of the two homologous parents
• give an example of incomplete dominance


  Red flowers and white flowers make pink flowers
• what is meant by F1


  the first filial generation
• what is meant by F2


  the second filial generation