In STR inheritance, which offspring inherits both alleles from parents?
Codominant STR markers reveal both maternal and paternal alleles in offspring. In a family where each parent possesses two distinct alleles, child inherits one allele from each parent, producing combined genotype containing contributions from both parental pairs. Some offspring may inherit particular combinations like one specific paternal and one maternal allele. Analyzing band patterns, individuals labeled A, B, D show both parental contributions present, demonstrating Mendelian segregation. This transmission pattern confirms heterozygosity and codominant expression essential for linkage mapping, forensics and parentage studies.
Ref: NCERT Biology Class XII Principles on Klenow fill-in labeling, Lehninger Chapter 9 DNA cloning techniques, and Molecular Cloning by Sambrook Chapter 10 documenting end-labeling of cohesive termini.