Monogenic inheritance

• Monogenic inheritance= inheritance of a single gene is shown.
• codominance= occurs when two different alleles occur for a gene- both are equally dominant.

  • As a result of both alleles of the gene are expressed in the phenotype.
• Sex linkage

  = Some chromosomes are determined by genes carried o the sex chromosome.

  • Y chromosome is smaller than x
  • There are a number of genes in x chromosome that males only have one copy of.
  • Any characteristic caused by a recessive allele on the section of the x chromosome, which is missing in the y chromosome, occurs more frequently in males because many females will also have a dominant allele present.