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प्रश्न
Explain the statement of Law of dominance is not universal.
उत्तर
- According to the law of dominance, when two homozygous individuals with one or more sets of contrasting characters are crossed, the alleles (characters) that appear in F1 are dominant and those which do not appear in F1 are recessive.
- In many cases, the dominance is not complete or absent. This can be explained by two deviations of Mendel’s law of dominance: Incomplete dominance and codominance. Thus, the law of dominance is significant and true, but it is not universally applicable.
संबंधित प्रश्न
Mention the Phenotype and Genotype ratios of the offspring in F2 generation.
Predict the genotype and phenotype of the following cross in pea.
TTrr x ttRR
(Capital letters show dominance)
Choose the correct answer:
Father of genetics ________
Explain the following term : Homozygous
Describe the cross between a homozygous tall, round-seeded pea plant and a dwarf, wrinkled-seeded pea plant. What will be the types of progeny in the F2 generation of this cross and in what proportion will it be?
Name and state the law which is explained by this example.
Give an account of incomplete dominance with a suitable example.
______ pairs of contrasting characters in pea plants were studied by Mendel in his experiments.
The F1 generation has all tall, and F2 ratio 3 : 1, it proves:
A male plant bearing red flowers was crossed with a female plant bearing yellow flowers. In the F1 generation, all the flowers were orange in colour.
Mention the ratio of red flowers, yellow flowers and orange flowers in the F2 generation.
What is the scientific name of the pea plant that Mendel used for his experiments?
