Practice question

Mendelian molecular markers are characterized by expression in heterozygotes. Codominant markers like SSR and SNP reveal both alleles from each parent as distinct bands. Dominant markers such as RAPD or AFLP show presence versus absence; a band present in only one parent and appearing in offspring represents dominant inheritance where heterozygote is indistinguishable from dominant homozygote. Recessive requires two copies for phenotype, epistasis involves interaction between loci. Single band inherited from one parent typifies dominant marker behavior, informative but unable to distinguish zygosity states.