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)