मराठी

Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be

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प्रश्न

Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be

पर्याय

  • double fertilisation

  • self pollination

  • cross fertilisation

  • no fertilisation

MCQ
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उत्तर

self pollination

Explanation - 

In the given cross, pink flowering plants have two dissimilar forms of the gene controlling flower color. So, on selfing of two pink flowers (Rr), red (RR), pink (Rr), and white (rr) flowers are obtained in the ratio 1:2:1.

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पाठ 9: Heredity and Evolution - Multiple Choice Questions [पृष्ठ ७३]

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एनसीईआरटी एक्झांप्लर Science Exemplar Class 10
पाठ 9 Heredity and Evolution
Multiple Choice Questions | Q 2. | पृष्ठ ७३

व्हिडिओ ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्‍न

How did Mendel interpret his results to show that traits may be dominant or recessive? Describe briefly.


In a monohybrid cross between tall pea plants (TT) and short pea plants (tt), a scientist obtained only tall pea plants (Tt) in the F1 generation. However, on selfing the F1 generation pea plants, he obtained both tall and short plants in F2 generation. On the basis of above observations with other angiosperms also, can the scientist arrive at a law? If yes, explain the law. If not, give justification for your answer.


Mendel crossed tall pea plants with dwarf pea plants in his experiment. Write his observations giving reason on the F1 and F2 generations.


Outline a project which aims to find the dominant coat colour in dogs.


Mendel said that the characteristics or traits of organisms are carried from one generation to the next by internal factors which occur in pairs. What is the modern name for these factors?


Name the first scientist who studied the inheritance of traits from one generation to the next.


What type of plants were used by Mendel for conducting his experiments on inheritance?


It it an example of monohybrid cross or dihybrid cross?

 

Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive:  

Yellow seed


State Mendel's second law of inheritance.


How do Mendel's experiments show that traits may be dominant or recessive?


A cross between two individuals results in a ratio of 9 : 3 : 3 : 1 for four possible phenotypes of progeny. This is an example of a ______.


In humans, if gene B gives brown eyes and gene b gives blue eyes. What will be the colour of eyes of the persons having the following combination of genes?
(a) Bb
(b) bb
(c) BB


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?


Explain Mendel’s law of independent inheritance. Give one example.


Define Heredity. Give two examples.


Why are the traits acquired during the life time of an individual not inherited? Explain.


Who is the pioneer of modern genetics?


What are the components of the DNA molecule?


If a tall pea plant is crossed with a pure dwarf pea plant then, what percentage of F1 and F2 generation respectively will be tall?


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