(1) The probability of homozygous dwarf progeny formed in a cross involving $ TT\: \times \: Tt$ parents is 0.75
(2) The probability of homozygous tall progeny formed in a cross involving $ TT\: \times \: TT$ parents is one
(3) The probability of heterozygous tall progeny formed in a cross involving $ TT\: \times \: tt$ parents is 0.5
(4) The probability of homozygous dwarf progeny formed in a cross involving $ TT\: \times \: TT$ parents is zero
$\begin {array} {1 1} (1)\;1\: and \: 2 & \quad (2)\;2\: and \: 3 \\ (3)\;1\: and \: 3 & \quad (4)\;2\: and \: 4 \end {array}$
