A condition when a dominant gene masks the effect of the other non-allelic gene is known as dominant epistasis. The gene that suppresses the other gene is known as inhibiting or epistatic factor and the one, which is prevented from exhibiting itself, is known as hypostatic. The fruit color in summer squash may be white, yellow, or green. White fruits are produced by a domain epistatic allele 'W'. At another locus, Y for yellow fruits is dominant to its allele y for green fruits. Dominant white hides the effect of yellow or green. A consequence of this dominant epistasis is that the hybrid ratio is modified into 12 white: 3 yellow: 1 green.
Fruit color in squash is an example of:
NEET UG 2014 — Zoology Principles of Inheritance and Variation
2014mcqmedium
Fruit color in squash is an example of:
Official previous-year question
Held on 30 Apr 2014 · Verified 9 Jul 2026.
Options
- A
Recessive epistasis
- B
Dominant epistasis
- C
Complementary genes
- D
Inhibitory genes
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