MM or mm, are called homozygous , and those whose alleles are different, Mm, are called heterozygous . Offspring of these parents will generally separate into two equal groups of math haters and math lovers. Students should review the outcomes of these standard pairings. This information can be used when studying family pedigree charts, charts used to follow the transference of a genetic trait through a family. Students can be instructed to develop Punnet squares for various combinations of heterozygous and homozygous parents.
Examples can be of a scientific nature.
The next section will describe how we can use this knowledge of genetic transference to study families and trace inherited traits through a family tree by means of a pedigree chart. Pedigree Charts Pedigree charts are a pictorial description of the expression of a certain genetic trait in a family. The reading and construction of pedigree charts will reinforce students skills in gathering and analyzing data as well as writing information in alternate forms. There are a few basic symbols and guidelines to follow when creating a pedigree chart for analysis. The location of an individual is described by the tier of the tree on which he or she resides and the numbered placement from left to right.