Question

comment on inability to roll the tongue pedigree chart​

Answer 1

Explanation:

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.

Aim

To prepare and analyse the pedigree charts.

Requirements

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

Procedure

1. Select a family with anyone of the monogenic traits like rolling of tongue, blood groups, ear lobes, widow’s peak and colour blindness.

2. Ask the person exhibiting the trait as to who in his/ her family has the trait in question.

3. Prepare a pedigree chart on the basis of the information collected, using appropriate symbols.

4. Examine the pedigree chart carefully to find out whether the disease is autosomal recessive, autosomal dominant, X-linked dominant or recessive and Y-linked dominant or recessive.