Practice question

Genotype describes allelic composition at specific locus. TT parental line produces only T-bearing gametes, tt only t-bearing gametes. Upon fertilisation each zygote receives one T and one t, resulting genotype Tt heterozygous. This genotype carries both tall and dwarf information but expresses tall due to dominance. TT represents homozygous dominant parental type, tt homozygous recessive, combination TT and tt would imply mixture of two pure lines not single F1 genotype, uniform heterozygous outcome reflects segregation without blending. Mastery ensures accurate interpretation of monohybrid and dihybrid progeny arrays, distinguishing dominance interactions from epistasis or linkage effects.