Advertisements
Advertisements
Question
Define the term gene flow.
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.
RELATED QUESTIONS
State the following:
Theory of recapitulation
According to Abiogenesis, life originated from
(1) Non-living matter
(2) Pre-existing life
(3) Oxygen
(4) Extra-terrestrial matter
How would the gene flow or genetic drift affect the population in which either of them happens to take place?
Define Population.
Long answer question.
Explain the different factors responsible for genetic variations.
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.
All are post zygotic barriers, EXCEPT
Hybrids develop to maturity but become sterile due to failure of proper gametogenesis. This is a post mating barrier called ____________.
Which of the following phenomena results in genetic recombination?
The structural, morphological change chromosome due to rearrangement is called ____________.
What is a small interbreeding group of population called?
Which statements are TRUE regarding genetic recombination?
- It occurs in asexually and sexually reproducing organisms.
- They occur due to random union of gametes, anaphasic separation of chromosomes, and crossing over.
- New genetic combinations result in variation.
Reasons for diversity in a living being is:
Define the term:
Genetic drift
Match the following
| Column A | Column B | ||
| (i) | Dryopithecus | (a) | Java and Peking |
| (ii) | Ramapithecus | (b) | Toung in South Africa |
| (iii) | Australopithecus | (c) | Lake Victoria of Africa |
| (iv) | Homo erectus | (d) | Shivalik hills in India |
Define the Transformation.
Which of the following is a pre-mating mechanism of isolation?
What is Genetic recombination?
