Monohybrid inheritance

• How do you carry out a test cross?

  Cross an unknown plant with a recessive trait plant (has to be homozygous), if any recessive traits come out in the phenotype, the unknown plant has to be heterozygous
• What is co-dominance?


  Not one allele is dominant over the other- both alleles are represented by a capital letter
• What is an example of co-dominance?

  Blood groups- A and B are co-dominant
• What is an example of a sex-linked disease?

  Haemophilia
• Which chromosome is the gene for haemophilia on?

  X chromosome
• What is the allele for haemophilia?

  X^h