Question

what is the genotype of individual ii-2? heterozygous homozygous dominant homozygous recessive

Explanation:

Step1: Analyze Pedigree Symbols

In pedigrees, squares are males, circles are females; filled symbols show affected individuals, empty show unaffected. The top generation has a filled female (affected) and empty male (unaffected). Their offspring (II generation) are all empty (unaffected). Then, II - 1 (empty male) and II - 2 (empty female) have a filled male (affected) child.

Step2: Determine Inheritance Pattern

Since affected child (recessive phenotype) is born to unaffected parents, the trait is recessive (parents must be carriers). For a recessive trait, unaffected parents with an affected child must be heterozygous (carry one recessive allele to pass to the child). So II - 2, being an unaffected parent of an affected child, must be heterozygous.

Answer:

Heterozygous