Genetic drift occurs when a few individuals of a species colonize an island. The particular phenomenon is known as:

(a) The bottleneck effect

(b) The founder effect

(c) Assortative mating

(d) Random mating 

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Directional selection favours:

(a) Both extremes of a trait

(b) Intermediate form of a trait

(c) Environmental differences

(d) One extreme form over the other extreme form and over intermediate forms of the trait

 

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Most often the factor that initiates the speciation of two populations is:

(a) Geographic isolation

(b) Inability of the gametes to fuse

(c) Different courtship behaviours

(d) Different copulatory organs

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The oldest fossils resemble:

1. Amoeba

2. Red algae

3. Heterotrophic bacteria

4. Autotrophic bacteria

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Reptilian ancestors of the mammals were the :-
1. Therapsids
2. Thecodonts
3. Pterosaurs
4. Plesiosaurs

Please attempt this question first.

Difficulty Level:


Lamarck's theory of evolution is also called

(1) Theory of special creation

(2) Inheritance of acquired characters

(3) Survival of the fittest

(4) None of these

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Industrial melanism is an example of

(1) Neo Darwinism

(2) Natural selection

(3) Mutation

(4) Neo Lamarckism

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism?

(1) Transduction

(2) Chromosomal aberrations

(3) Genetic drift

(4) Recombination

Please attempt this question first.

Difficulty Level:


Artificial selection to obtain cows yielding high milk output represents

(a) Stabilising selection as it stabilizes this character in the population

(b) Directional as it pushes the mean of the character in one direction

(c) Disruptive as it spills the population into two, one yielding higher output and the other lower output

(d) Stabilizing followed by disruptive as it stabilizes the population of producing higher yielding cows

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In Hardy- Weinberg equation, the frequency of heterozygous individual is represented by

(a) P2

(b) 2pq

(c) pq

(d) q2

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level: