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प्रश्न
What is Genetic variations?
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उत्तर
Genetic variation is the difference in DNA sequences between individuals within a population. Variation occurs in germ cells, i.e., sperm and egg, and also in somatic (all other) cells. Only variation that arises in germ cells can be inherited from one individual to another and so affect population dynamics, and ultimately evolution. Mutations and recombination are major sources of variation.
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संबंधित प्रश्न
Give two chromosomal similarities between man and apes.
According to Abiogenesis, life originated from
(1) Non-living matter
(2) Pre-existing life
(3) Oxygen
(4) Extra-terrestrial matter
Long answer question.
By taking industrial melanism as one example. Explain the concept of natural selection.
Any random fluctuation in allele frequency, occurring in the natural population by pure chance is called __________.
What is hybrid sterility?
Write down the three main concepts of the modern synthetic theory.
Which theory provides explanation for both natural selection as well as mutation?
____________ brings about evolutionary changes by favouring differential reproduction of genes.
Which animal was very conspicuously visible on the tree trunks after the industrial revolution (1845) in Great Britain?
Domestic wheat, which has 42 chromosomes, is probably hexaploid (6n), whereas the haploid number in the ancestral ones was 7. Find out the right reason as to how are such plants produced?
