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प्रश्न
Why law of segregation is also called the law of purity of gametes?
उत्तर
- A diploid organism contains two factors for each trait in its diploid cells and the factors segregate during the formation of gametes.
- The two alleles (contrasting characters) do not mix, alter or dilute each other and the gametes formed are ‘pure’ for the characters which they carry.
- A gamete may carry either a dominant or recessive factor but not both.
Hence, this law is also called the law of purity of gametes.
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संबंधित प्रश्न
The F2 progeny of a monohybrid cross showed phenotypic and genotypic ratio as 1:2:1 unlike that the Mendel’s monohybrid F2 ratio. With the help of a suitable example, work out a cross and explain how it is possible.
Give appropriate biological/technical terms for the following:
The suppressed allele of a gene.
Choose the correct answer:
A cross where two pairs of alleles are considered is a ____________
Which one of the following characters studied by Mendel in garden pea was found to be dominant?
If a round, green seeded pea plant (RRyy) is crossed with a wrinkled, yellow seeded pea plant (rrYY), the seeds produced in the F1 generation are ______.
Read the following and answer from given below:
Prashant wanted to find the genotype of a pea plant bearing purple coloured flowers in his kitchen garden. For this, he crossed purple-flowered plants with white-flowered plants. As a result, all plants which were produced had purple flowers only. Upon selfing these plants, 75 purple flower plants and 25 white flowers plants were produced. Now, he can determine the genotype of a purple-flowered plant by crossing it with a white-flowered plant.
Which of the following cannot be derived from the crosses done by Prashant?
In Mendel's experiments, colour of seed coat, nature of flower, position of flower, colour of pod, height of stem, are called
Do you think Mendel’s laws of inheritance would have been different if the characters that he chose were located on the same chromosome.
Mendel blended his knowledge of science and mathematics to keep count of the individuals exhibiting a particular trait in each generation. He observed a number of contrasting visible characters controlled in pea plants in a field. He conducted many experiments to arrive at the laws of inheritance.
- What do the F1 progeny of tall plants with round seeds and short plants with wrinkled seeds look like?
- Name the recessive traits in the above case.
- Mention the type of the new combinations of plants obtained in F2 progeny along with their ratio, if F1 progeny was allowed to self-pollinate.
OR
If 1600 plants were obtained in F2 progeny, write the number of plants having traits:
- Tall with round seeds.
- Short with wrinkled seeds.
Write the conclusion of the above experiment.
