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प्रश्न
Answer the following question.
Name the plant Mendel used for his experiment. What type of progeny was obtained by Mendel in F1 and F2 generations when he crossed the tall and short plants? Write the ratio he obtained in F2 generation plants.
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उत्तर
Mendel used pea plant (Pisum sativum) for his experiments. When Mendel crossed tall and short plants, the progeny obtained in Fl generation was tall. When the Fl plants were selfed, the F2 generation showed three tall and one dwarf plants. The genotypic ratio of F2 generation is 1: 2: 1 (TT: Tt: Tt: tt) and the phenotypic ratio is 3: 1 (Tall: Dwarf).
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संबंधित प्रश्न
A cross was made between pure breeding pea plants one with round and green seeds and the other with wrinkled and yellow seeds.
(a) Write the phenotype of F1 progeny. Give reason for your answer.
(b) Write the different types of F2 progeny obtained along with their ration when F1 progeny was selfed.
A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as:
Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive:
Yellow seed
How do Mendel's experiments show that traits are inherited independently?
"It is possible that a trait is inherited but may not be expressed." Give a suitable example to justify this statement.
Why are the traits acquired during the life time of an individual not inherited? Explain.
What will be the number of chromosomes present in each gamete produced by the plants if the palisade cells of a species of the plant contain 28 chromosomes in all?
Assertion: When pure breed tall plants are crossed with pure breed short plants, all the plants in F1 progeny are tall. When the tall plants of F1 progeny are crossed, short plants re-appear in F2 progeny.
Reason: Traits are independently inherited.
Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be
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
