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प्रश्न
Explain Mendel’s law of independent inheritance. Give one example.
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उत्तर
Mendel’s law of independent assortment states that
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When two pairs of traits are combined in a hybrid, one pair of character segregates independent of the other pair of character.
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In a dihybrid cross between two plants having round yellow (RRYY) and wrinkled green seeds (rryy), four types of gametes (RY, Ry, rY, ry) are produced. Each of these segregate independent of each other, each having a frequency of 25% of the total gametes produced.
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संबंधित प्रश्न
List any two contrasting characters other than height that Mendel used in his experiments in pea plants.
Mendel in one of his experiments with pea plants crossed a variety having round seed with one having wrinkled seeds. Write his observations, giving reasons, of F1 and F2 progeny
How is the equal genetic contribution of male and female parents ensured in the progeny?
The gene for red hair is recessive to the gene for black hair. What will be the hair colour of a person if he inherits a gene for red hair from his mother and a gene for black hair from his father?
What is the genotype of tall plants which always produced tall offspring
Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive:
Yellow seed
A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants because :
(a) tallness is the dominant trait
(b) shortness is the dominant trait
(c) tallness is the recessive trait
(d) height of plant is not governed by gene T or t
List two differences in tabular form between dominant trait and recessive traits. What percentage/proportion of the plants in the F2 generation/progeny were round, in Mendel's cross between round and wrinkled pea plants?
"It is possible that a trait is inherited but may not be expressed." Give a suitable example to justify this statement.
What is genetics?
