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Prepare Pedigree Charts Of Any One Of The Genetic Traits Such As Rolling Of Tongue Blood Groups Ear Lobes Widows Peak And Colour Blindness

A pedigree chart is a flowchart or a diagrammatic representation prepared to exhibit the occurrence and appearance or phenotypes of a particular gene or organism along with its ancestors from one generation to the next generation. In the pedigree chart, males are represented by a square and a circle represents the females. Also Read:  Pedigree Analysis Here is a simple experiment on how to prepare and analyse the pedigree charts.

To prepare and analyse the pedigree charts.

Information about traits in a family for more than one generation.

Autosomal Dominant Trait-  Blood Groups , Free hanging earlobes, Widow’s Peak, Rolling of tongue The encoding gene for these genes is present on any of the autosomes. In these traits, the mutant allele is dominant. Such type of traits exhibit the following features:

The mutant allele of such traits is recessive. Salient features of such type of traits include:

The encoding gene for such traits is located on the X  chromosome . The mutant allele is dominant in this trait. The features of such type of traits are:

In such type of traits, the mutant allele is recessive to the wild type allele. The features of X-linked recessive traits include:

The gene for such traits is present on the Y-chromosome. Any trait linked to Y-chromosome is found only in males and not in females because the Y-chromosome is present only in males. All the sons of the affected male exhibit the trait, whereas, none of the daughters exhibits the trait. Also Read:  Genetic disorders