Advertisements
Advertisements
Question
What is Genetic variations?
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
Give any ‘two’ factors responsible for genetic variation.
Write down the three main concepts of the modern synthetic theory.
Which theory provides explanation for both natural selection as well as mutation?
Match the columns and choose the correct option.
| Column I | Column II | ||
| i. | Ecological isolation | a. | Sexually mature at different times of the year |
| ii. | Ethological isolation | b. | Specific mating behaviours |
| iii. | Mechanical isolation | c. | Difference in structure of mating organs |
| iv. | Seasonal isolation | d. | Same geographic region but separate habitat |
Which of the following is TRUE for zygote mortality?
Identify the INCORRECT statement.
Which of the following phenomena results in genetic recombination?
Identify the method of reproductive isolation, when members of a population attain sexual maturity at different times preventing interbreeding.
Reproductive isolation does not occur due to ______.
Define the term:
Genetic drift
