Advertisements
Advertisements
Question
"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.
Solution
Yes, we agree with the statement. Some changes always appear when animals produce their progeny by sexual reproduction. One of the progeny may be taller than the other. The advantage of long legs to the progeny is that when no food is available on the ground, those with long legs can reach the leaves on tall trees, eat them and survive. On the other hand, the progeny that are short cannot reach the leaves on tall trees. They will not get any food and eventually die from starvation. Now, since long legs are a beneficial variation, the long-legged animals will live long enough to produce their offsprings. So, all the future generations will be long-legged.
APPEARS IN
RELATED QUESTIONS
"We cannot pass on to our progeny the experiences and qualifications earned during our life time". Justify the statement giving reason and examples.
With the help of suitable examples, explain why certain traits cannot be passed on to the next generation. What are such traits called?
What are the different ways in which individuals with a particular trait may increase in a population?
Why are the small numbers of surviving tigers a cause of worry from the point of view of genetics?
What is meant by dominant genes and recessive genes? Give one example of each.
Fill in the following blank with suitable word :
The human forelimb and bat's forelimb are an example of .......... organs whereas an insect's wing and a bat's wing are an example of ........... organs.
Answer the following question in ‘One’ sentence only:
Define ‘mutation breeding’.
Transfer of a part of chromosome or set of genes to a non-homologous chromosome is called ________.
The idea of mutation was brought forth by:
While studying the stages in the evolution of man, a well-developed chin is observed in ______.
