In a family, the father had a trait but the mother did not. All their sons and daughters had this trait. The same trait was found in some grand daughters, though daughters were married to normal persons. In this pedigree the genotypes of the father, mother, and husband of daughters are

Question

In a family, the father had a trait but the mother did not. All their sons and daughters had this trait. The same trait was found in some grand daughters, though daughters were married to normal persons. In this pedigree the genotypes of the father, mother, and husband of daughters are, father is AA, the mother is aa, husbands are aa, father is AA, the mother is aa, and husbands are AA, father is aa, the mother is Aa, husbands AA, father is AA, mother AA, one husband is Aa, and second husband aa.

MARKS App · Accepted Answer

The pedigree analysis provides information regarding inheritance of particular traits or diseases and using it we can predict the possibility of appearance of any traits in the new generation. An analysis chart is a visual tool for observing biological relationships within and between families and to understand the mode of inheritance of genetic diseases. Father has the trait (homozygous) and the mother is not having the trait (homozygous). Their children are having the trait, which means the trait is dominant as it can be expressed in heterozygous condition. Also, it passed to some grand-children proving it to be dominant. Thus, the genotype of the father is AA, the mother is aa and the husbands married to daughters have the genotype aa.

Search any question & find its solution

Looking for more such questions to practice?