Diploid somatic cells
Haploid
gametes
Diploid cells have two copies of every chromosome, while haploid cells only
have one copy of each chromosome.
23
23
Spermatogenesis creates sperm in the testes, while oogenesis
produces eggs in the ovaries.
23
14
4
24
39
48
13
20
34
630
spindle
chromatids
tetrad
4
tetrad
crossing
They must replicate
gametes
over
nuclear membrane
Centrioles
spindle fibers
Chromatin
chromatids
tetrads
Crossing over
centromeres
metaphase
homologous chromosomes
Nuclear membrane
Spindle fibers
Cytokinesis
Sister
chromatids
Nuclear membrane
Spindle fibers
Chromatin
chromatids
spindle fibers
metaphase plate
chromosomes
poles
Nuclear membrane
haploid cells
• In this unit we learned about Mitosis and the cell cycle. We also
learned that chromosomes are made out of chromatids. In addition
we learned about DNA replication.
• In the unit DNA and Mitosis, we learned about the cell cycle, and all
the parts of that cycle. Such as Interphase, Mitosis, and Cytokinesis.
There are three parts to Interphase, G1(cell is growing), S (DNA is
replicated), and G2 (organelles duplicated). We also learned the
stages, PMAT, prophase, metaphase, anaphase, telophase.
• Cells spend most of their lives in interphase and replicate through
the process of mitosis. This includes prophase, metaphase,
anaphase, telophase, and then cytokinesis. DNa was also discussed
at great length. DNA is a main nucleic acid polymer that holds our
genes and makes us who we are. It took several scientists to reveal
that DNA carries the genetic code, but it has now changed the way
we live.