Advertisements
Advertisements
प्रश्न
What are genes? Where are the genes located?
उत्तर
Genes are basic units of hereditary. They are the means of passing characters/ traits from one generation to another. Genes are located on chromosomes. They are linear segments of DNA that code for a gene product. They can be dominant or recessive depending upon how they express themselves.
संबंधित प्रश्न
Explain the concept ‘survival of the fittest’.
With the help of suitable examples, explain why certain traits cannot be passed on to the next generation. What are such traits called?
Why are the small numbers of surviving tigers a cause of worry from the point of view of genetics?
Some plants occur in one of the two sizes : tall or dwarf. This characteristic is controlled by one pair of genes. Tallness is dominant to dwarfness. Choose suitable letters for this gene pair.
What is meant by acquired and inherited traits? Explain with one example each.
"Only variations that confer an advantage to an individual organism will survive in a population". Do you agree with this statement? Give reason for your answer.
State the meaning of inherited traits and acquired traits. Which of the two is not passes on the next generation? Explain with the help of an example.
Short answer question.
Draw a graph to show that natural selection leads to disruptive change.
Explain stabilizing, directional and disruptive selection with examples.
The sequence of gradual changes which takes place in the primitive organisms over millions of years in which new species are produced is known as ______