Question

By crossing a short pea plant with a heterozygous tall pea plant, we can get 100 short progeny. What will be the expected number of tall progenies?​

Answer 1

Answer: generation of dominant individuals (Tt). According to the law of dominance, a trait is represented by two contrasting factors of a gene in a heterozygous individual; the allele/factor that can express itself in a heterozygous individual is called as a dominant trait. The another factor whose effect is masked by the presence of dominant factor is called recessive factor. The recessive factor, t, is present in F  

hybrids but its expression is masked by the factor for a dominant trait, T. Thus, all progeny exhibit tallness. If tallness was a recessive trait, it would not have been expressed in heterozygous progeny (Tt). If dwarfism was a dominant trait, the heterozygous progeny (Tt) would have expressed it and was dwarf.