Which one of the following pairs of features is a good example of polygenic inheritance?

Grain colour in wheat is determined by three pairs of polygenes. Following the cross $AABBCC$ (dark colour) $\times$ $aabbcc$ (light colour),in $F_2$ generation,what proportion of the progeny is likely to resemble either parent?

It is easier to study polygenic inheritance of characters in plants than in animals because in plants:

Polygenic traits exhibit $....$.

The grain color in wheat is controlled by three pairs of polygenes. When a red-grained wheat variety is crossed with a white-grained variety,an $F_1$ hybrid is produced. When the $F_1$ hybrid is self-pollinated,what fraction of the $F_2$ generation will resemble the parental phenotypes?

$A$ characteristic showing continuous variation is controlled by a