Inheritence in action

• Homozygous- an individual with two identical allles for a characteristic e.g. DD,dd
• phenotype-describes physical appearance of an individual regarding a particular characteristic e.g. dimples, no dimples
• heterozygous- an individual with different alleles for a characteristic
• genotype- describes the genetic makeup of an individual regarding a particular characteristic
• genes- the chromosomes you inherit carry you genetic information
• alleles- many of these genes have different versions
• each allele does for different versions of protein

  the combination of alleles you inherit will determine your characteristics
• dominant alleles- always expressed in the genotype, even if one copy is present. shown always using a capital letter
• recessive alleles- expressed if 2 copies are present. shown using lowercase letter