Randomised Friday 26th September 2008 Issue 15

Welcome Randomisers! Next Friday is Jeans for Genes Day so slip into your skinnies (or do you prefer bootcut?) and take part in a good cause.

  1. Wassup Planet Science? - The Pirate Quiz
  2. Sooo Random - Forensic linguistics? Woteva nxt?!
  3. Over 2U! - Reebops
  4. Gear Giveaway - Crisp Packet Fireworks book
  5. Winners - Dr Frankenstein’s Human Body Book

1. Wassup Planet Science? – what’s new on the Planet Science website

pirateology bookYarr me hearties! Step aboard the good ship Planet Science and avail yeself of some vittals! There be ten questions ahead of ye. By the leg of Long John Silver we’d be sore amazed if ye failed to get ‘em right and take yer place in the draw for a Pirateology book ‘n’ puppet combo.

What are ye waiting for? Fast to the questions and may there be a fair wind behind ye – Ha! Harrrr!

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2. Sooo Random - Science news straight to your Inbox...

Did you know that text message analysis is becoming a powerful tool in solving crime cases? No? Us neither. Apparently people choose their own text language “rules” which they tend to use throughout their messages.

In February 2008, linguistic evidence contributed to the conviction of David Hodgson in the murder of Jenny Nicholl. Forensic linguists studied Jenny’s style of texting and decided that messages supposedly sent by her after she went missing could not have come from her. For example, Jenny Nicholl used “my” and “myself” while David Hodgson often adopted Yorkshire dialect, using “me” and “meself.” Forensic linguists can also build a “sociolinguistic” profile of the author: they can give an idea of a texter's gender or age - but not their personality.

“What you find is very stereotypical - women tend to be inter-personal while men make arrangements,” said Dr Tim Grant from the Centre for Forensic Linguistics at Aston University.

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3. Over 2U! - Science experiments for you to try at home...

Reebops

reebops experimentUsing marshmallow models to explain why you look like your parents. You might want to watch the Reebops film first to get an idea of how it all works.

You will need:

  • Different coloured pieces of paper - pink and blue make the genders obvious
  • A felt tip pen
  • Large pink and white marshmallows - more than you think you will need because you will eat some
  • Small white marshmallows
  • Cocktail sticks
  • Coloured map pins (blue, yellow and red)

What to do:

1. Cut strips of paper to represent the reebops chromosomes. There will be 8 pairs of each length in each colour. If each strip is 2cm wide you'll need two pieces of each coloured paper. Start with the pink, cut two strips of each length...20cm, 18cm, 16cm, 14cm, 12cm, 10cm, 8cm and 6cm. You are left with 16 strips of pink chromosomes - repeat the process with the blue paper.

2. Arrange the same length strips next to each other. Now write on each strip in felt tip. On the first pink pair write 'A' on one and 'a' on the other, do the same with the longest blue strips.

3. Repeat this with the remaining chromosomes so you have...

Aa on 20cm
Bb on 18cm
Tt on 16cm
Nn on 14cm
Ll on 12cm
Ee on 10cm
Hh on 8cm
XX (pink) or XY (blue) on 6cm

4. What you will end up with is a complete set of pink chromosomes - 8 pairs, and a complete set of blue chromosomes, again 8 pairs.

5. To make this totally random you can turn them over so you can't see the letters.

6. Now create the genetic make up of your baby reebop - pick one from each of the pairs of pink chromosomes to create the egg cell. Then repeat with one from each of the pairs of blue chromosomes to make a sperm cell.

7. Now fuse the chromosomes from the egg and sperm cells by matching up the same length of chromosome until you have a new set of 8 pairs. Turn them over so you can see the letters.

8. Now you can start to construct your baby reebop...

The following list tells you the features your reebop will have...

AA antennae Aa antennae aa no antennae
BB 3 body parts Bb 3 body parts bb two body parts
TT curly tail Tt curly tail tt straight tail
NN red nose Nn red nose nn yellow nose
LL blue legs Ll blue legs ll red legs
EE two eyes Ee two eyes ee one eye
HH one hump Hh one hump hh three humps
XX Female XY male  

9. Follow the genetic instructions to construct your baby reebop - use the cocktail sticks to attach the body and head then attach any humps, legs, eyes and antennae with map pins. You may want to construct female reebops from pink marshmallows and male reebops from whites ones.

What's happening?

In meiosis, cells split to create egg and sperm cells which randomly contain half the genetic material of the parent cells. When these fuse to create the first cell of the new reebop they contain a random mix of both the mother's and the father's chromosomes.

These chromosomes contain dominant and recessive genes. The dominant genes, which are shown with capital letters, will express their characteristic - having a red nose or blue legs. It is only if this dominant gene is absent that the recessive gene can express itself - producing red legs or a yellow nose.

Special Safety Advice

Do not eat the reebops you have made as they may contain concealed cocktail sticks or map pins (always keep a supply of fresh marshmallows if you feel you have to eat some).

This activity came from the Reebops activity on the SciCast site

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4. Gear Giveaway - You’ve got to be in it to win it...

crisp packet fireworksThis week we have a fantastic science book called Crisp Packet Fireworks by Chris Smith and Dave Ansell (aka The Naked Scientists). It features over 40 fun and intriguing science experiments to set up in your own home. So if you want to turn rice into quicksand, generate a cloud in a lemonade bottle and build a toaster-powered hot air balloon then this is the book for you!

Here are more details of the Crisp Packet Fireworks book

If you want to win it email us with your name and address, and the words ‘CRISPY SCIENCE’ in the subject line, to randomised.news@nesta.org.uk

The draw will take place at 5pm on Wednesday 8th October.

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5. Winners - Has your name been picked out of the bag?

Last time we were offering Dr Frankenstein’s Human Body Book from Dorling Kindersley. The lucky winner is Kirsty Aird of Surrey. Have fun Kirsty!

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THAT'S ALL FOR NOW

You've been Randomised!

Send any questions, comments, jokes or experiment ideas to: randomised.news@nesta.org.uk

Bye for now!