A pea plant with pure yellow (YY) round (RR) seeds were crossed with a plant having pure green (yy) wrinkled (rr) seeds.

(i) What would be the nature of the offsprings in the $F_{1}$ – generation?

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Solution

The nature of the offsprings in the $F_{1}$ generation is that all seeds are Round and Yellow.

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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 $F_{1}$ generation. When $F_{1}$ generation 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?

A pea plant with pure Yellow (YY) Round (RR) seeds was crossed with a plant having pure green (yy) wrinkled (rr) seeds. What would be the nature of offspring in the F1- generation?

Q. A pea plant with pure yellow (YY) round (RR) seeds were crossed with a plant having pure green (yy) wrinkled (rr) seeds.

(ii) If the offsprings of the

F_{1}

-generation are self-pollinated, what would be the phenotypic ratio in

F_{2}

–generation.

A pea plant with pure yellow (YY) and round (RR) seeds were crossed with a plant having pure green (yy) wrinkled (rr) seeds.

On which law, following is based:

The off-springs of the F-₁ generation are self-pollinated.

Q. Question 5
If a round, green seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant (rr YY), the seeds produced in F1 generation are

(a) round and yellow
(b) round and green
(c) wrinkled and green
(d) wrinkled and yellow

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Law of Dominance

Standard XII Biology

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A pea plant with pure yellow (YY) round (RR) seeds were crossed with a plant having pure green (yy) wrinkled (rr) seeds. (i) What would be the nature of the offsprings in the F1 – generation?

The nature of the offsprings in the F1 generation is that all seeds are Round and Yellow.

A pea plant with pure yellow (YY) round (RR) seeds were crossed with a plant having pure green (yy) wrinkled (rr) seeds.

(i) What would be the nature of the offsprings in the $F_{1}$ – generation?

The nature of the offsprings in the $F_{1}$ generation is that all seeds are Round and Yellow.