Protected: Practice questions for Topic 4

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So how is Biology going to change the world? Genetic engineering and Biotechnology, Topic 4.4

Now I know that I keep saying this in class but I firmly believe that Biotechnology is going to have a profound (hopefully positive) impact upon our world. One possible future development could be the advent of personalised medicine. Want to know more then check out the TED talk below from Nina Tandon

In this section we used THIS Slideshare from to investigate the curriculum aims for this section of the syllabus, make sure that you revisit any sections that you are not sure about on the Slideshare and your text books.


We have now finished all of topic 4 which means it is time for a topic test. You will write the topic test the first week back after the holiday. Over the next few days I hope to post some practice questions for you to work on. Remember, to access the top levels in he test you will need to prepare thoroughly!

On that note I came across the excellent video below which uses beads to demonstrate the process of Mitosis and Meiosis.


Theoretical Genetics topic 4.3

Welcome to the section on Theoretical Genetics. Before I start this section of Topic 4 I should like to share THIS article with you. It tells of the production of a synthetic chromosome placed into a Eukaryotic cell – yeast. This is I am sure the first of many such chromosomal modifications. The question to ask now I suppose is who is going to decide what is and is not morally and ethically permissible?


During this section we will look at THIS slideshare from the excellent I-Biology Website. If you want some practice with monohybrid crosses then check out THIS website and if you want practice with Pedigree charts check out this link.

So just how do we produce Gametes which are unique – Meiosis?


I can remember when I was at school learning about Meiosis that my Biology teacher was forever going on about Meiosis and why it was just sooooo important for a species to produce offspring with different blends of alleles. Hopefully, by the time we have covered this section you will all appreciate both the importance of Meiosis, and you will be able to explain why Meiosis is often referred to as a “Reduction Division”.

We will also look at how Meiosis can go wrong, and the consequences of this; Down’s syndrome will be studied as an example.

Again we will get to play ‘Doctor’ and will learn to use the technique of Karyotyping to “diagnose” chromosome abnormalities, though obviously knowing that an unborn child has genetic abnormalities does raise many ethical implications (look back to the last post and the article on Fetus food).

Mr Taylor has produced this excellent SlideShare presentation on Meiosis from I-Biology, and we will use this site to practice Karyotyping Karyotyping Activity.

By the end of this section you should also be able to use the following key words correctly:-

haploid, diploid,  homologous chromosomes, crossing over, non-disjunction, karyotyping,trisomy


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