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# Mendel First Crossed Pure-bred Pea Plants Having Round-yellow Seeds with Pure-bred Pea Plants A) What Will Be the Number of (I) Round Green Seeds (Ii) Wrinkled Green Seeds (Iii) Round Yellow Seeds, and (Iv) Wrinkled-yellow Seeds? (B) Which 'Ratio' as Established by Mendel Have You Made Use of in Answering the Part (A) Above? - CBSE Class 10 - Science

ConceptRules for the Inheritance of Traits - Mendel’s Contributions

#### Question

Mendel first crossed pure-bred pea plants having round-yellow seeds with pure-bred pea plants having wrinkled-green seeds and found that only round-yellow seeds were produced in the F1 generation. When F1generation pea plants having round-yellow seeds were cross-bred by self pollination, then peas having round-yellow seeds, round green seeds, wrinkled-yellow seeds and wrinkled-green seeds were produced. Mendel collected a total of 2160 seeds.
(a) What will be the number of (i) round green seeds (ii) wrinkled green seeds (iii) round yellow seeds, and (iv) wrinkled-yellow seeds?
(b) Which 'ratio' as established by Mendel have you made use of in answering the part (a) above?

#### Solution

(1) Number of round green seeds = 2160/16 xx 3 = 405

(2) Number of wrinkled green seeds = 2160/16 xx 1 = 135

(3) Number of round yellow seeds = 2160/16 xx 9 = 1215

(4) Number of wrinkled yellow seeds = 2160/16 xx 3 = 405

b) The dihybrid ratio (which is 9: 3: 3: 1) has been used to answer part (a).

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#### APPEARS IN

Lakhmir Singh Solution for Biology for Class 10 (2018 to Current)
Chapter 4: Heredity and Evolution
Q: 79 | Page no. 196

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Solution Mendel First Crossed Pure-bred Pea Plants Having Round-yellow Seeds with Pure-bred Pea Plants A) What Will Be the Number of (I) Round Green Seeds (Ii) Wrinkled Green Seeds (Iii) Round Yellow Seeds, and (Iv) Wrinkled-yellow Seeds? (B) Which 'Ratio' as Established by Mendel Have You Made Use of in Answering the Part (A) Above? Concept: Rules for the Inheritance of Traits - Mendel’s Contributions.
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