mitochondria

[andy_o]

I recently read that mitochondria can only be inherrited from the mother. How many mitochondria you have in your muscles cells depends on whether they are fast or slow twitch. So my question is would it be sensible to presume that your fibres come from the mothers side?

[svass]

@andy_o

I recently read that mitochondria can only be inherrited from the mother. How many mitochondria you have in your muscles cells depends on whether they are fast or slow twitch. So my question is would it be sensible to presume that your fibres come from the mothers side?

Point A is incorrect - our body can make new mitochondria if the energetic requirements of the cell demand it. Perhaps you are speaking of mitochondrial rna/dna?

Point B is correct, again due to the bioenergetic requirements of the cell - slow twitch = primarily oxidative (increased mito.); fast twitch = primarily glycolytic (decreased mito.)

How you made he jump from point a to point b is beyond me.

[Vito]

@andy_o

I recently read that mitochondria can only be inherrited from the mother. How many mitochondria you have in your muscles cells depends on whether they are fast or slow twitch. So my question is would it be sensible to presume that your fibres come from the mothers side?

Can you perhaps tell us the source of where you read this?

[rice773]

@andy_o

I recently read that mitochondria can only be inherrited from the mother. How many mitochondria you have in your muscles cells depends on whether they are fast or slow twitch. So my question is would it be sensible to presume that your fibres come from the mothers side?

Mitochondria and chloroplasts (plants) contain their own circular DNA which codes for structure/enzymes which are used within them ect. These are the only organelles or structures in the body which do not contain the identical DNA found in the rest of the body. Mitochondrial DNA is inherited from the mother only, as it is already in the egg before it is fertilized. The mitochondrial DNA codes for the creation of mitochondria, but muscle cells are coded for by ‘regular’ DNA so i don’t think your fast/slow twich would be determined by your mother only.

[andy_o]

@rice773

Mitochondria and chloroplasts (plants) contain their own circular DNA which codes for structure/enzymes which are used within them ect. These are the only organelles or structures in the body which do not contain the identical DNA found in the rest of the body. Mitochondrial DNA is inherited from the mother only, as it is already in the egg before it is fertilized. The mitochondrial DNA codes for the creation of mitochondria, but muscle cells are coded for by ‘regular’ DNA so i don’t think your fast/slow twich would be determined by your mother only.

Thanks kidda!!!