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Question
Define the term gene flow.
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Solution
Gene flow is the movement of genes into or out of a population. Gene movement may be in the form of migration of organism, or gametes or segments of DNA Gene flow also alters gene frequency, causing evolutionary change.
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RELATED QUESTIONS
According to Abiogenesis, life originated from
(1) Non-living matter
(2) Pre-existing life
(3) Oxygen
(4) Extra-terrestrial matter
Short answer question.
Enlist the different factors that are responsible for changing gene frequency.
Any random fluctuation in allele frequency, occurring in the natural population by pure chance is called __________.
Write down the three main concepts of the modern synthetic theory.
The total genetic information encoded in sum total of genes in a Mendelian population is called ______.
Match the columns and choose the correct option.
| Column I | Column II | ||
| i. | Zygote mortality | a. | Hybrid develops to maturity but becomes sterile |
| ii. | Hybrid sterility | b. | Egg is fertilized but zygote dies |
| iii. | Gamete mortality | c. | Union of two gametes does not occur in the iven time |
______ is the separation of the population of a particular species into smaller units which prevents interbreeding between them.
Identify the method of reproductive isolation, when members of a population attain sexual maturity at different times preventing interbreeding.
Define the term:
Genetic drift
What is reproductive isolation?
