Advertisement
Advertisement
egg cell
Word History and Origins
Origin of egg cell1
Example Sentences
Because stem cells can be rapidly created from skin or other cells, they are an endless source of raw material to make sperm and egg cells.
The team next mixed in a dose of precursor immature egg cells, also made from stem cells.
So plants have evolved different ways to get their pollen to the egg cells of other plants.
A pollen grain can fertilize the egg cell of other plant of the same species, eventually forming a seed that can grow into another plant.
In 1996, researchers at the Roslin Institute cloned a cell taken from the mammary gland of a 6-year-old Finn Dorset sheep and an egg cell taken from a Scottish blackface sheep, and the result was Dolly.
Each single one of these (in healthy men) is capable of fertilising a woman's egg-cell and giving rise to a new human being.
When the pollen has been placed on this surface it grows, germinates, and part of it unites with the egg-cell of the young seed.
Then chromosomes of definite size and form, and corresponding in number to those present in the fertilised egg-cell, again appear.
The latter he regarded as arising directly from the egg-cell, and never from somatic cells.
Thirdly, the reproductive cells are derived from the egg-cell just in the same way as other tissue cells are derived from it.
Advertisement
Advertisement
Advertisement
Advertisement
Browse