Wednesday, 15 May 2013

5.19 describe the stages in the production of cloned mammals involving the introduction of a diploid nucleus from a mature cell into an enucleated egg cell, illustrated by Dolly the sheep

A egg cell with the nucleus removed has the DNA of another cell put in (this will be have a complete set of chromosones (diploid number of)). The embryo that forms will then have DNA from only one parent: the one the DNA was taken from. This means it will be a clone! for example dolly the sheep.

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13 comments:

  1. Hong Kong Shaun29 April 2014 at 03:17

    wow... thanks to your site I crammed the whole syllabus in 7 days... and maybe lots of others have done the same as I've noticed the page views have increased by about 12,000 since last week thanks for the great guide IT WAS A TIRING JOURNEY BUT I MADE IT THROUGH with this resource so i thought the least i could do was say thanks LOL

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    1. HannahHelp24 May 2014 at 07:41

      Hahaha that has gotta be a full on week! I'm fairly impressed by your cramming abilities, and whatever you get you deserve an A* for perseverance haha ;) Thank you for your message, its really cool to hear that I helped you out :) I hope you get the grade you want!

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    2. Unknown16 April 2016 at 11:07

      i have crammed my sciences in 3 days

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    3. Unknown3 January 2017 at 13:37

      SAME

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  2. Unknown31 March 2015 at 03:02

    hey hannah i just want to thank you for all your effort,I've used you guide throughout and it was really easy to understand and thanks to you i've been doing well in all my exams that i've taken so far and also because of you I am more than prepared to do my IGCSE exam on may and i couldn't be more great full thanks

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    1. HannahHelp17 June 2015 at 16:13

      Hey Salma, I'm really glad you liked the blog and that you are doing well :) Hope you get the grades you wanted!

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  3. Unknown10 May 2015 at 06:13

    This comment has been removed by the author.

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  4. Sahil770911 May 2015 at 14:04

    Thank you sooo much!

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  5. Unknown16 May 2016 at 08:24

    A large heat/electrical shock is also used when the DNA from the somatic cell is put into the enuclaleated egg cell so that the cell actually starts dividing

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  6. Unknown16 May 2016 at 08:25

    The embryo is also put into a surrogate mother

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  7. Unknown9 April 2017 at 22:27

    Thanks a ton, Hannah! This blog is fantastic!

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  8. Mike Tsang26 June 2017 at 04:28

    The Biology Syllabus has changed…

    Here is a New blog for the 2017 Syllabus:

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

    ReplyDelete
  9. SophieRice27 June 2017 at 06:13

    more at

    http://igcse-biology-notes.blogspot.hk/2017/06/519-describe-stages-in-production-of.html

    ReplyDelete

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