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Genetic Variations

Which of the ...

Question

Which of the following statement is incorrect with respect to variations?
(a) all variations in a species have an equal chance of survival
(b) change in genetic composition results in variations
(c) selection of variations by environmental factors torus the basis of the evolutionary process
(d) variations are the minimum in asexual reproduction

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Solution

(a) all variations in a species have an equal chance of survival
All variations in a species do not have an equal chance of survival. Variations may either be beneficial or harmful to the species.

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Q. Question 15
Which of the following statements is not true with respect to variation?

(a) All variations in a species have equal chance of survival.
(b) Change in genetic composition results in variation.
(c) Selection of variants by environmental factors forms the basis of evolutionary processes.
(d) Variation is minimum in asexual reproduction.

Q. Statement 1: All the variations in a species have equal chances of survival.

Statement 2: In asexually reproducing organisms minimum variations are present.

Assertion (A): Differences in a population are created by genetic variations.

Reason (R): Driving factor for variation is the source of sexual reproduction and also asexual reproduction.

Q. All variations in an organism have an equal chance of survival.

Q. Which of the following statement is true for variation in organisms?
(P) The occurrence of differences among the individuals of the same species is known as variation.
(Q) Variations decrease the possibilities of survival.
(R) The process of evolution decreases the variation in organisms.
(S) During meiosis, crossing over takes place between the genes and hence, combinations are formed, which ultimately results in producing variations.

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