Monohybrid inheritance

• Monohybrid inheritance

  The inheritance of characteristics controlled by A single gene
• Mendels 3rd law

  Recessive alleles can be masked by dominant alleles

  
• mendels 1st law

  of a pair of characteristics only 1 can be represented in the gametes

  
• Test cross

  -Allows the genotype of an individual showing the dominant phenotype to be determined

  -Work out the genotype of an organism

  -unknown crossed with homozygous recessive
• what is the ratio ALWAYS for 2 heterozygous only

  DD:DR:RD:RR

  9 : 3 : 3 : 1
• Mendels 2nd law

  Each pair of characteristics segregated independantly