Question

The pedigree below depicts a dominant trait. What is the genotype of individual I-1 (use the letter A for a dominant allele and a for a recessive allele)? How did you come to this conclusion? Using your best grammar, write 3-5 sentences.

Answer 1

A pedigree chart is a diagrammatic representation showing the occurrence and appearance of phenotypes of a particular gene/traits and its ancestors from one generation to the next establishing relationships between individuals in a family.

Using the letter A for a dominant allele and a for a recessive allele, the genotype of individual I-1 is Aa.

• In the key pedigree nomenclature, an individual marked with the black ink is affected with the trait (and this trait is dominant - A).
• Looking at the F1 generation, there are males affected and females as well.
• For inheritance of the trait, just one copy is enough to become affected.
• Therefore, the male parent is heterozygous for the trait and the female normal (aa) to enable the production of both affected and non-affected individuals.

Learn more about pedigrees: brainly.com/question/318443