If a homozygous red-flowered plant is crossed with a homozygous white-flowered plant,the offspring would be

$A$ cross between two homozygous parents that differ in only one gene locus is known as a....

$A$ black dog heterozygous for the colour is crossed with a white bitch,which is recessive homozygous. The progeny will show black to white offspring in the ratio of:

$A$ heterozygous tall pea plant was crossed with a dwarf pea plant. The progeny of the cross shows . . . . . . .

The ratio of offspring produced by a cross between an $F_1$ heterozygote and a recessive parent is ....

When a pure tall plant is crossed with a pure dwarf plant,and the resulting hybrid plants are self-pollinated,what will be the phenotypic ratio of the offspring in the $F_2$ generation?