Question

Choose the correct genotype of the parents of the offsprings which are half tall and half dwarf when tall (T) is dominant over dwarf (t).

• A. $Tt\times tt$
• B. $Tt\times Tt$
• C. $X^T{X}^T\times X^t{X}^t$
• D. $X^T{X}^t\times X^T{X}^t$

Answer 1

The correct option is A $Tt\times tt$

A cross between heterozygous tall (Tt) and homozygous dwarf (tt) will obtain tall and dwarf progeny in 1:1 ratio. A cross between two heterozygous tall parents (Tt x Tt) will give tall (Tt) and dwarf progeny (tt) in 3:1 ratio respectively. Height is not X-linked character. Thus, the correct answer is A.