InterviewSolution
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InterviewSolution
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(a)What is variation ? How is variation created in a population? How does thecreation of variation in a species promote survival?Explain how, offspring and parents of organisms reproducing sexually have thesame number of chromosomes.(b) |
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Answer» a)variations occurs due to some variations in genes of DNA, due to variations new type of species occur ,as variation occurs in genes the new type of species which also have some differences from previous population. the creation of variation in species promote survival as the new species formed have some new quality in them &they are fittest to survive in nature &the species which don't have variations will not fight for food, place, &their survival &died b)The Normal Cell of an humam has 23 pairs of chromosomes .(43 in number).. Bt the Germ cell (Sperm or Ova) ..has only 23 chromosomes means Half of the chrmosomes compared to other cells When Male(sperm - half chromosomes - 23) and femle(ova = half chromosomes= 23) Mingles the no of chromosomes comes to The normal no (full 46) |
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