Q. 94.3( 4 Votes )

Select the incorrect statement
A. Frequency of certain genes in a population change over several generations resulting in evolution

B. Reduction in weight of the organism due to starvation is genetically controlled

C. Low weight parents can have heavy weight progeny

D. Traits which are not inherited over generations do not cause evolution

Class 10th NCERT - Science Exemplar 9. Heredity and Evolution

Answer :

Reduction in weight of the organism due to starvation is external environmentally determined factor. It is not genetically controlled because it will not change the DNA of germ cells. Hence, option ‘b’ shows incorrect statement.

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PREVIOUSA zygote which has an X-chromosome inherited from the father will develop into a NEXTNew species may be formed ifi. DNA undergoes significant changes in germ cellsii. chromosome number changes in the gameteiii. there is no change in the genetic materialiv. mating does not take place

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