Cell Growth & Division. Do cells grow? Yes but with limitations if a cell grows to be too large it requires more energy and resources to maintain metabolism and homeostasis
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As multicellular organisms grow, their cells multiply rather than growing indefinitely.
During the time of cell life between divisions the DNA is less tightly coiled allowing its information to be “read” and processed by the cell.
In humans these are the X / Y chromosomes
The majority of inherited trait are contained on these chromosomes.
2 Sex chromosomes
46 total chromosomes
Every organism produced by sexual reproduction has 2 copies of each autosome.
1 pair of sex chromosomes
23 total pairs of chromosomes
Diploid cells are abbreviated as 2n
Reproductive or sex cells are called haploid cells because they have only 1 set of chromosomes and only 1 sex chromosome (X or Y).
Haploid cells are abbreviated as 1n
1n + 1n = 2n
The first 3 phases of the cell cycle make up the period we refer to as interphase.
There are many times in which mature cells will leave the cell cycle during the G1 phase.