Question

Draw a pedigree to depict the following family: One couple has a son and a daughter with normal skin pigmentation. Another couple has one son and two daughters with normal skin pigmentation. The daughter from the first couple has three children with the son of the second couple. Their son and one daughter have albinism; their other daughter has normal skin pigmentation.

Answer 1

Answer:

The required pedigree is given in the attachment:

Refer to the key for understanding symbols.

Explanation:

• A record of occurrence  of a trait in several generation of a human family is called pedigree analysis.
• It is quite easy to identify some forms of inheritance from study of pedigrees.
• The pedigree analysis is useful in sexually reproducing organism where number of offspring is small.
• It also helps us in giving information about the genotype of an individual; for trait under investigation.
• It also provides information to the would be couples regarding the danger of certain genetic defect which might run in their family.