Posts Tagged ‘genetics’

Higher level genetics

Saturday, August 6th, 2011

This is Topic 10.  Syllabus guide here: IB-Biology-HL-Topic-10-syllabus-guide

Hopefully, much of this will be REVIEW.  I’m planning to spend 3 lessons – no more.

Firstly, meiosisHere’s what you need to know. BE CAREFUL with the vocab.

Next, dihybrid crosses and gene linkage.  This is the fun stuff! Presentation here.  PRACTICE makes maybe not perfect, but certainly BETTER 🙂

Lastly, polygenic inheritance.  What is it and how does it work? This will explain.

First assessment of the year will be MONDAY 15th AUGUST.

What phase of meiosis is shown in this picture?

Almost there!

Monday, June 6th, 2011

Claire's cakes by wuperruper on flickr

Just when you thought it was all over …. without you knowing it, we have been working through Topic 10, which is the higher level material on meiosis and genetics.  I am fairly happy that we will complete this before you disappear for a few well-earned weeks of rest.  Here is the syllabus guide for the topic, and a link to the presentation we used in class. IB Biology HL Topic 10 – syllabus guide

This presentation is an excellent review and extension of meiosis.  And this one is all about polygenic inheritance.

Warning – test ahead!

Wednesday, October 20th, 2010

no lifeguard on duty by Zoramite on flickr (modified)

Grade 10s  – you have a test coming on Genetics and Variation.  B block will take it on November 4th, E block on November 5th. 

Take a look at this revision checklist.  It will help prepare you for your test after the break.  Good luck!

Grade 10 REVISION checklist for Variation and Genetics


Monday, October 11th, 2010

Genetics by Here's Kate on flickr

The system of inheritance is actually very logical.  We will learn what alleles are and how they combine to form an individual’s characteristics.  We will look at simple monohybrid crosses, involving things like eye colour, tongue-rolling and earlobes.  Then we will expand into multiple alleles and co-dominance (blood groups).  Next we’ll understand why equal numbers of boys and girls are born in the world and look at examples of sex-linked inheritance.  We will be simplifying the concepts – in reality many human characteristics are controlled by several genes on different chromosomes – so the real picture is more complex.  And we’ll finish up with a discussion of how much of our variation is down to our genes, and how much is due to environment.

There will be some new vocabulary to learn (Genetics terms), then lots and lots of problems to solve.  Try these ones for starters:  Genetics Questions and Simple Genetics problems

Here are some questions on co-dominance, multiple alleles and sex-linkage. Genetics Problems

This document contains a list of great websites with plenty more genetics practice. Online genetics problems

Linkage and recombinants

Thursday, August 13th, 2009

Here is the document we worked through in class today, with some extra bits on meiosis too.  Thanks to Mr. Boulton for the resource. Topic 10 notes

Topic 10 Syllabus outline

Tuesday, August 11th, 2009
Genetics by Here's Kate on flickr

Genetics by Here's Kate on flickr

Here is the syllabus guide for Topic 10 – the HL stuff on meiosis and genetics.    IB Biology HL Topic 10 – syllabus guide

It should help you prepare for your test NEXT WEEK.  Mark your diaries – Thurs 20th August.  The majority of the questions will be on Topic 10, but I reserve the right to throw in a few from Topic 4 – Syllabus outline (SL genetics) for good measure.  Format will be IB past paper questions, both multiple choice and short answer.

Dihybrid crosses

Monday, August 10th, 2009

Here are some good sites for information about dihybrid crosses.  There are also lots of practice problems to try.  We will use these in class on Tuesday.

1. This site has a lot of clear information and activities.  A good starting point.

2.  This site has several problems for you to work through with nice hints to help if you get stuck.

3.  The Biology Project from the University of Arizona is always worth a look, although it is quite advanced.