CELL DIVISION; OVERVIEW
, Objectives
The chromosome theory of inheritance
Mitosis
Meiosis
Clinical applications
, Chromosome theory of
inheritance
Humans have 23 homologous pairs of
chromosomes (22 autosomal and 2 sex
chromosomes (XX or XY)
Each gamete (oocyte or sperm)has an haploid
number of chromosomes (23 only); and when
they unite make 46 chromosomes
, Mitosis
Process whereby one parent cell divides, giving
two daughter cells GENETICALLY IDENTICAL to
parent cell
Each daughter cell receives the complete
complement of 46 chromosomes.
Before a cell enters mitosis, each chromosome
replicates its deoxyribonucleic acid (DNA).
PROPHASE: Chromosomes coil, contract and
condense. Chromatids and centromere.
METAPHASE: Chromosomes line up at the
equatorial plane. Each is attached by
microtubules extending from the centromere
to the centriole, forming the mitotic spindle.
, Objectives
The chromosome theory of inheritance
Mitosis
Meiosis
Clinical applications
, Chromosome theory of
inheritance
Humans have 23 homologous pairs of
chromosomes (22 autosomal and 2 sex
chromosomes (XX or XY)
Each gamete (oocyte or sperm)has an haploid
number of chromosomes (23 only); and when
they unite make 46 chromosomes
, Mitosis
Process whereby one parent cell divides, giving
two daughter cells GENETICALLY IDENTICAL to
parent cell
Each daughter cell receives the complete
complement of 46 chromosomes.
Before a cell enters mitosis, each chromosome
replicates its deoxyribonucleic acid (DNA).
PROPHASE: Chromosomes coil, contract and
condense. Chromatids and centromere.
METAPHASE: Chromosomes line up at the
equatorial plane. Each is attached by
microtubules extending from the centromere
to the centriole, forming the mitotic spindle.
