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प्रश्न
The farmers have been cultivating a food plant X for over two thousand years and have produced as many as five entirely different looking vegetables A, B, C, D and E from it.
(a) What could the plant X be?
(b) What are A, B, C, D and E?
(c) What is the process of evolution involved in this example known as?
उत्तर
(a) X is wild cabbage.
(b) A is cabbage, B is broccoli, C is cauliflower, D is kohlrabi, E is kale.
(c) The process of artificial selection is involved in this example.
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संबंधित प्रश्न
How did Mendel interpret his results to show that traits may be dominant or recessive? Describe briefly.
List any two contrasting characters other than roundness of pea plants that Mendel used in his experiments with pea plants.
Name the first scientist who studied the inheritance of traits from one generation to the next.
Fill in the following blank with suitable word .
In pea plants, the gene for dwarfness is ..............whereas that for tallness is ............ .
Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive:
Yellow seed
The following results were obtained by a scientist who crossed the F1 generation of pure-breeding parents for round and wrinkled seeds.
| Dominant trait | Recessive trait | No. of F2 offspring |
| Round seeds | Wrinkled seeds | 7524 |
From these results, it can be concluded that the actual number of round seeds he obtained was ______
A trait in an organism is influenced by ______
A red-haired woman marries a brown-haired man, and all the children are brown haired. Explain this genetically.
Pure-bred round-yellow pea seeds have genotype RRYY and the pure-bred wrinkled-green pea seeds have genotype rryy. Keeping this in mind, write the phenotypes of the following genotypes of hybrid pea seeds :
(a) Rryy
(b) rrYy
(c) rrYY
(d) RrYy
(e) RRyy
Hereditary characters are transferred from parents to offspring by ______ hence they are said to be structural and functional units of heredity.
