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प्रश्न
Enlist the steps of controlled cross pollination. Would emasculation be needed in a cucurbit plant? Give reasons for your answer.
उत्तर
Steps of controlled cross pollination: Selection of parents → Emasculation → Bagging → Collection of pollen from male parent →Dusting the pollen on stigma →Re-bagging Emasculation could not be needed in a cucurbit plant because it has unisexual flowers.
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संबंधित प्रश्न
In a homozygous pea plant, axial flowers (A) are dominant over terminal flowers (a).
(i) What is the phenotype and genotype of the F1 generation if a plant bearing pure axial flowers is crossed with a plant bearing pure terminal flowers?
(ii) Draw a Punnett square board to show the gametes and offsprings when both the parent plants are heterozygous for axial flowers.
(iii) What is the phenotypic ratio and genotypic ratio of the above cross shown in (ii)?
(iv) State Mendel’s Law of Dominance.
(v) Name two genetic disorders commonly seen in human males.
A pea plant which is homozygous for green pods which are inflated [GGII] is crossed with a homozygous plant for yellow pods which are constricted [ggii]. Answer the following questions;
a) Give the phenotype and genotype of the F1 generation.
Which type of pollination has occurred to produce F1 generation?
b) Write the phenotypic ratio of the F2 generation
c) Write the possible combinations of the gametes that can be obtained if two F1 hybrid plants are crossed.
d) State Mendel’s law of ‘Segregation of Gametes’
5) What is the scientific name of the plant which Mendel used for his experiments on inheritance?
In Mendel’s experiments, tall pea plants (T) are dominant over dwarf pea plants (t).
What is the phenotype and genotype of the F1 generation if a homozygous tall plant is crossed with a homozygous dwarf plant?
Define the following:
Heterozygous
State whether the following statement is true or false:
The dominant character masks the recessive character.
First geneticist/father of genetics was ______.
The inheritance pattern of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to ______.
What does the progeny of a tall plant with round seeds and a short plant with wrinkled seeds look like?
Which is the one characteristic of the parents that can be inherited by their children?
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.
To determine the genotype of a purple-flowered plant, Prashant crossed this plant with a white-flowered plant. This cross represents a ______
