Key Area 1
(a) Division of somatic and germline cells
In this first section, you will look at the division of somatic and germline cells. You should complete the "Something to Read" section and then choose at least 1 other task to complement your at-home learning.
Something to Read...
Open the document below and read the mandatory course notes provided by SQA for this Key Area. You may wish to use your home learning time to copy these notes into a jotter or choose a digital presentation format that suits your learning style.
Something to Watch...
Click on the white button below to watch the video comparing mitosis and meiosis.
Something to look at...
Look at the following diagrams comparing somatic and germline cells.
Somatic cells
Somatic cells include all the cells in a multicellular organism except for germ cells (eggs or sperm). Mutations or changes to the DNA in the soma will not be inherited by subsequent generations.
Germline cells
Germ (or germline) cells are those involved in sexual reproduction: eggs, sperm, and precursor cells that develop into eggs or sperm. The DNA in germ cells, including any mutations or intentional genetic edits, may be passed down to the next generation. In contrast, the genetic material in somatic cells (all the cells in the body except for germ cells) cannot be inherited by offspring. Note that genome editing in an early embryo is considered to be germline editing since any DNA changes will likely end up in all cells of the organism that is eventually born.
Something to do...
Open Jamboard and present your understanding of this key area as a new Jam. Download the frame as an image and share with your teacher prior to your next lesson.
Go to SCHOLAR to access the content shown in the image opposite.
You are now ready for your in-class lesson on division of human cells. Remember to bring any questions or queries with you.
Click here if you are ready to move onto Cellular differentiation.
