DNA Replication Chapter 8.1 Flashcards
genetically identical individuals from asexual reproduction (plants and fungi)
In animals 9 sponges, coral animals, hydra, and jellyfishes “bud” genetically identical clones that breakaway from the parent.
How long do new cells live for
An average of about 35 days
Purpose of cell division
produces a continuous supply of replacement cells. (cell death)
. Growth and development
. Cell death
A single cell organism( or some eukaryotes) replicates its genetic material and splitting the contents of one cell into two
. It generates genetically identical offspring
. From one parent
How do most prokaryotes reproduce
The simplest form of asexual reproduction usually used by bacteria and archaea
The production of offsprings whose genetic makeup comes from two parents.
. Each parent contribute a sex cell
. Because sexual reproduction mixes and recombines traits, the offsprings are genetically different from each other
process by which a parent cell divides into two or more daughter cells.
3 types of cell division
- Binary fission —- prokaryote
2. Meiosis and 3. Mitosis ——Eukaryotes
2 types of cell division in Eukaryotes
A special type of cell division necessary for sexual reproduction in eukaryotes.
.The cells produced by meiosis are gametes or spores.
. In many organisms, including all animals and land plants (but not some other groups such as fungi), gametes are called sperm and egg cells.
. meiosis produces cells that are genetically DIFFERENT from one another and the parent.
. For Reproduction
The union of the gametes ( sperm cell and egg cell ) to make a zygote
the first cell of a new eukaryotic organism ( created by fertilization , when the 2 sex cell join ( sperm and egg)
What type of cell division creates gametes ( sex cells )
Meiosis (meiosis produces cells that are genetically DIFFERENT from one another and the parent.)
After fertilization and the creation of the zygote what happens
Mitosis immediately takes over