Q.Parthenocarpic fruits lack

Normally fertilization triggers the ovary to become a fruit and the ovule to become a seed; parthenocarpy is the development of a fruit-like structure from the ovary without any fertilization at all, so parthenocarpic fruits invariably lack true seeds - many commercially important fruits, including banana, grapes and papaya, are deliberately bred or induced to be seedless in exactly this way. Nitsch (1963) classified parthenocarpy by cause into three types: genetic parthenocarpy, arising from hybridization or mutation (Citrus, Cucurbita); environmental parthenocarpy, induced by conditions such as frost, fog or temperature extremes (e.g. 3-19 hours of low temperature induces it in Pear); and chemically induced parthenocarpy, triggered by applying growth-promoting hormones suc …