Monday 20 May 2013

3.19 understand how to interpret family pedigrees

A pedigree diagram shows a specific gene in a family. It will have a key but most often: a circle represents a female and a square represents a male; often coloured in represents one allele and blank another (but sometimes they are different colours.)

In this diagram, the mother and two sons have a different genes to the others:

sads
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2 comments:

  1. Mike Tsang26 June 2017 at 04:40

    The Biology Syllabus has changed…

    Here is a New blog for the 2017 Syllabus:

    http://igcse-biology-2017.blogspot.hk

    ReplyDelete
  2. SophieRice27 June 2017 at 06:20

    more at

    http://igcse-biology-notes.blogspot.hk/2017/06/319-understand-how-to-interpret-family.html

    ReplyDelete

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