Advertisements
Advertisements
Question
Name any three types of premating isolating mechanisms.
Advertisements
Solution
Pre-mating or pre-zygotic isolating mechanism: This mechanism prevents fertilization and zygote formation.
- Habitat isolation or (Ecological isolation): Members of a population living in the same geographic region but occupying separate habitats in such a way that potential mates do not meet.
- Seasonal or temporal isolation: Members of a population living in the same geographic region but are sexually mature at different years or different times of the year.
- Ethological isolation: Due to specific mating behavior the members of the population do not mate.
- Mechanical Isolation: Members of two populations have differences in the structure of reproductive organs.
APPEARS IN
RELATED QUESTIONS
List three distinguishing features, in tabular form, between acquired traits and the inherited traits.
Give any two distinctive features of Dryopithecus.
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.
Explain how, characteristics (or traits) are inherited through genes.
Which of the following gas was not present in early earth atmosphere?
(a) Ammonia
(b) Oxygen
(c) Hydrogen sulphide
(d) Methane
Write a short note based on the information known to you.
Evolution
Answer the following question in ‘One’ sentence only:
Define ‘mutation breeding’.
Short answer question.
What is disruptive selection?
____________ results in variation in gene frequencies within population by chance rather than by natural selection.
Evolution occurs as a result of mutations in ______.
