2. Chromosomes contain the genetic information
Chromosomes are made up of DNA
All cells contain chromosomes
Usually chromosomes are in loose strands called
chromatin
However, when DNA is replicated or cells are
ready to divide, the chromosomes tighten and coil
up
3. Every cell has chromosomes
Chromosomes are usually found in pairs
In humans, most body chromosomes are found in
pairs
There are usually 23 pairs of chromosomes
23 pairs equals 46 individual chromosomes
A cell that has 23 pairs (or 46 chromosomes) is a
DIPLOID cell
4. Sex cells are produced by the second division in
Meiosis
Sex cells are NOT diploid cells
Sex cells only have 23 chromosomes
Sex cell have NO pairs of chromosomes
Sex cells are HAPLOID cells
5. Diploid – has pairs of chromosomes
Haploid – has a single set of chromosomes
In humans, diploid cells have 23 pairs of
chromosomes
In humans, haploid cells have 23 chromosomes
(NO PAIRS)
6. Diploid – has pairs of chromosomes
Haploid – has a single set of chromosomes
In humans, diploid cells have 23 pairs of
chromosomes
In humans, haploid cells have 23 chromosomes
(NO PAIRS)