Question

cross between tall plant with tall plant the result in the f1 generation 84 tall plant and 29 recessive short plant​

Answer 1

ANS

Correct option is

C

Tallness is a dominant trait.

A cross between two pure breeding tall (TT) and dwarf (tt) parent plants produce uniform F

1

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. Another factor whose effect is masked by the presence of a dominant factor is called a recessive factor. The recessive factor, t, is present in F

1

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.

Thus, the correct answer is option C.