do mitochondria only come from maternal side?

Answer 1

For the most part, yes. Egg cells have tons of mitochondria, but a sperm cell has only one. Even that one doesn't enter the egg cell on fertilization, so the zygote has only mitochondria from the mother.

Answer 2

yes they only come from the mother only in the egg
the sperm's mitochondria and mitochondrial DNA is not passed in fertilization of the egg
mitochondria are organelles in the cytoplasm that contain their own DNA different from that in the nucleus
They can be used for paternity testing mother-daugther/son
and

FINALLY all mitochondrial DNA have been traced back to a catasthropic event 74-75,000 years ago when the human race was almost extinct we were down to between 100s or 1000s of pairs
They believe a super-volcanoe blasted in indonesia and formed the last ice age

Study evolutionary biology

Answer 3

Yes, also they exist outside of the cell's nucleus (animal cell) that's why in forensics its easier to obtain mitochondria vs. nuclear DNA

What's the thumbs down for, I answered the question correctly.

BTW maternal = mother's side
paternal = father's side
(for those who posted this backwards)

Answer 4

Yes. The egg carries all the mitochondria that develop into the offspring's mitochondria.

Answer 5

Yes indeed they are only passed maternally. This is because the mitochondia in the male are used to provide the energy to move the flagella in the sperm cells.

Answer 6

I am not sure but I know that mitochondrial DNA is passed from mother to child. I hope this helps.