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According to the evolutionary theory, formation of a new species is generally due to - Science

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प्रश्न

According to the evolutionary theory, formation of a new species is generally due to

पर्याय

  • sudden creation by nature

  • accumulation of variations over several generations

  • clones formed during asexual reproduction

  • movement of individuals from one habitat to another

MCQ

उत्तर

accumulation of variations over several generations

Explanation - 

According to the evolutionary theory, the accumulation of variations (resulting from errors in DNA copying and sexual reproduction) over several generations along with the operation of natural selection leads to the formation of new species.

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पाठ 9: Heredity and Evolution - Multiple Choice Questions [पृष्ठ ७६]

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एनसीईआरटी एक्झांप्लर Science [English] Class 10
पाठ 9 Heredity and Evolution
Multiple Choice Questions | Q 18. | पृष्ठ ७६

संबंधित प्रश्‍न

Filling the blank based on the given relationship.

3 : 1 Monohybrid : : 9 : 3 : 3 : 1 : ______


Explain dihybrid cross.

What is a dihybrid cross? How did Mendel perform this cross?


Give Technical Term:

The ratio of offspring on F2 generation in a dihybrid cross.


Under which conditions does the law of independent assortment hold good and why?


In a test cross involving F1 dihybrid flies, more parental type offspring were produced than the recombination type offspring. This indicates


What are the reasons for Mendel’s successes in his breeding experiment?


In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that ______.


A normal green male maize is crossed with albino female. The progeny is albino because ______.


The process of mating between closely related individuals is ______.


In a dihybrid cross, F2 phenotypic ratio is 13 : 3. It is case of ______.


Given below is a dihybrid cross performed on Drosophila.

Which of the following conclusions can be drawn on the basis of this cross? When yellow bodied (y), white-eyed (w) Drosophila females were hybridized with brown bodied (y+), red-eyed males (w+) and F1 progenies were intercrossed, F2 generation would have shown the following ratio:


From the list given below, select the character which can be acquired but not inherited


Do genetic combination of mothers play a significant role in determining the sex of a new born?


Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation.

What will be set of genes present in the F1 generation?


Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation.

Give a reason why only tall plants are observed in F1 progeny.


Mendel's law of independent assortment is based on F2 ratio of:


Describe the dihybrid cross upto F2 generation as conducted by Gregor Mendel using pure lines of Garden Pea for characters-seed shape and seed colour.


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