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

 

Variation in gene frequencies within populations can occur by chance rather than by natural selection. 
This is referred to as:

1. Genetic drift

2. Random mating

3. Genetic load

4. Genetic flow

Darwin's finches are a good example of:

1. industrial melanism

2. connecting link

3. adaptive radiation

4. convergent evolution

Given that the frequency of children homozygous for the recessive allele for cystic
fibrosis is about 0.0016. What is the frequency of heterozygotes in the population? [Cystic fibrosis is inherited as an autosomal recessive disorder].

1. 0.960

2. 0.077

3. 0.040

4. 0.923

Peripatus is a connecting link between:

1. Ctenophora and Plantyhelminthes

2. Mollusca and Echinodermata

3. Annelida and Arthropoda

4. Coelenterata and Poriphera

One of the important consequences of geographical isolation is:

1. no change in the isolated fauna

2. preventing speciation

3. speciation through reproductive isolation

4. random creation of new species

The finches of the Galapagos islands provide evidence in favour of:

1. special creation

2. evolution due to mutation

3. retrogressive evolution

4. biogeographical evolution

Which one of the following is not a living fossil?

1. King crab

2. Sphenodon

3. Archaeopteryx

4. Peripatus

The most recent and direct pre-historic ancestor is:

1. Cro-magnon 

2. Neanderthal

3. Pre-neaderthal

4. None of these