Fruit colour in squash is an example of

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(B) : $A$ dominant epistatic allele suppresses the expression of a non-allelic gene, whether the latter is dominant or recessive.The gene that suppres

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dominant epistasis

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(B) : $A$ dominant epistatic allele suppresses the expression of a non-allelic gene, whether the latter is dominant or recessive.The gene that suppresses the expression of a non-allelic gene is known as an epistatic gene.The gene or locus that is suppressed by the presence of a non-allelic gene is termed as a hypostatic gene.In summer squash or $Cucurbita 	ext{ } pepo$, there are three types of fruit colour: white, yellow, and green.White colour is dominant over other colours, while yellow is dominant over green.Yellow colour is formed only when the dominant epistatic gene is represented by its recessive allele $(w)$.When the hypostatic gene is also recessive $(y)$, the colour of the fruit is green.Thus, the inheritance pattern is:$W-Y- 	ext{ or } W-yy ightarrow 	ext{White}$$wwY- ightarrow 	ext{Yellow}$$wwyy ightarrow 	ext{Green}$

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