Question

Can you try to explain the inheritance of the character of Free or Attached Ear lobes? Given alongside are pedigree charts of two families A and B. In family A, both parents have free ear lobes and those of family B, have attached ear lobes (Recollect from the previous example what the symbols of circle and square, indicate).
Can you find the answers to the following?
Family B has all children of one type only, whereas family A has both types. Parents in which family are heterozygous for the character?

Answer 1

● Family A has a heterozygous genotype for a character because they have both hollow and solid symbols, which means that family A has both homozygous and heterozygous genotypes for the same character.
● While family B has only solid symbols for the character hence it is homozygous.