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Ayushree
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Asked: 2025-09-26T11:32:47+00:00 In:

In a pea plant, the trait of flowers bearing purple colour (PP) is a dominant over white colour (pp). Explain the inheritance pattern of F₁ and F₂ generations with the help of a cross following the rules of inheritance of traits. State the visible characters of F₁ and F₂ progenies.

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In pea plants, purple flowers (PP) are dominant over white (pp). Crossing PP × pp gives F₁ as Pp, all showing purple flowers.

F₁ self-crossed (Pp × Pp) produces F₂ in 3:1 ratio: 3 purple, 1 white.

F₁ visible characters: All purple flowers.
F₂ visible characters: Three purple, one white flower.

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cbse sample paper class 10 science 2025-26class 10 science half yearly paperclass 10 science half yearly paper on tiwari academythe trait of flowers bearing purple colour (pp)
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    1. ANSWER: In pea plants, purple flower (P) is dominant over white (p). When a pure purple (PP) is crossed with a pure white (pp), all F₁ generation plants are Pp, showing purple flowers, as the dominant trait masks the recessive one. When two F₁ plants (Pp × Pp) are self-crossed, the F₂ generation shows a genotypic ratio of 1 PP: 2 Pp: 1 pp and a phenotypic ratio of 3 purple: 1 white.

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