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[Solved] BIO301 Assignment 3 Fall 2020


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BIO301 Assignment 3 Fall 2020 Solution idea:

 

Assignment No. 3

Bio301: Essentials of genetics Fall 2020

Total Marks: 10 Due date: 24st January 2020

 

 Question No. 1

  • What is mutation? Write types of mutation? What are the benefits of mutation? (1+3+1)

Mutation is the spontaneously change in the sequence of nucleotides of the DNA which result in formation of abnormal protein.

 

  1. Point mutation:

 It is a type of mutation which is result in change in one nucleotide or a nitrogenous base sequence in DNA or protein which causes disorder.

 

  1. Chromosomal abnormalities

These are caused by the change in the number and structure of the chromosome. It is due to deletion, inversion and duplication of chromosome.

Benefits of mutation

The population which undergoes mutation has greater chances of survival in the environment as compare to common individual.

Mutation provides the raw material for the evolution in the form of genetic evolution.

 

·Briefly discuss the significance and role of polyploidy in evolution. Be sure to state whether autoploidy or alloploidy has been more important in speciation and why?(5)

Polyploidy is principally duplication of entire genome of the organism. Polyploidy is very important in the process of evolution, because this is produced the variation in the next generation. The biased retention of genes following WGDs offers a unique evolutionary potential to evolve key innovations and to increase biological complexity in the long term. The consequences of polyploidization are complex and variable, and they differ greatly between systems and species, but the process has often been considered to be an evolutionary end.

Alloploidy has to be proof more significant than autoploidy, because it has effect of hybridization of DNA which leads to evolution. Allopolyploids contain two or more distinct genomes and can arise through hybridization of two different species concomitant with genome doubling.

 

 

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