Search over 10,000 free study notes

Homozygous means there are two copies of the same allele present at a specific locus (position) on a chromosome, e.g. two copies of the allele for blue eyes. Whereas, heterozygous means there are two copi...

Simply put, it is a form of a gene which can lead to different phenotypes, e.g. eye colour. There is one allele that codes for blue eyes and another allele that codes for brown eyes. 

A punnett square is a diagram that is used to predict the outcome of a particular cross or breeding experiment. This can be used for plants, animals and humans. 

Everything you do in English should be carried out in stages to ensure that you've done it all thoroughly. ​First, when analysing an image, you need to look at the colours. Dark colours tend to represent ...