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प्रश्न
Given below is a schematic diagram showing Mendel’s Experiment on sweet pea plants having axial flowers with round seeds (AARR) and Terminal flowers with wrinkled seeds (aarr). Study the same and answer the questions that follow :
(i) Give the phenotype of F1 progeny.
(ii) Give the phenotypes of F2 progeny produced upon by the self-pollination of F1 progeny.
(iii) Give the phenotypic ratio of F2 progeny.
(iv) Name and explain the law induced by Mendel on the basis of the above observation.
उत्तर
(i) Axial round
(ii) Axial round, axial wrinkled, terminal round, terminal wrinkled.
(iii) 9:3:3:1
(iv) Law of independent assortment: When there are two pairs of contrasting characters, the distribution of factors of each pair in the gametes is independent of the distribution of other pairs of characters.
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संबंधित प्रश्न
Define the following:
Recessive
Suppose you are given two pairs of contrasting characters: Seed colour → yellow and green , seed coat → round and wrinkled.
Fill in the following table to show that F2 generation according to the principle of independant assortment as given by Mendel.
| Selfing among hybrids of F1 | RY | Ry | rY | ry |
| RY | ||||
| Ry | ||||
| rY | ||||
| Ry | ||||
| F2 generation |
Define the term heredity.
Choose the correct answer:
A cross where two pairs of alleles are considered is a ____________
Give Technical Term:
The hereditary unit, which is responsible for inheritance.
Mendel’s law of independent assortment does not hold true for the genes that are located closely on ______.
Which of the following statement is incorrect?
What does the progeny of a tall plant with round seeds and a short plant with wrinkled seeds look like?
If two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the flowers are red and 25% are white. The genotypic constitution of the parents having red coloured blowers will be:
