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Chromosomes, Mitosis, and Meiosis6.1
Karyotype – Image of all the chromosomes in a cell
Autosomes – Chromosomes 1-22
Sex Chromosomes – #23
Homologous chromosomes – pair of matching chromosomes
Somatic cells
Gametes
-Body cells
-Reproductive cells
Life Cycle of a cell
Mom gave
Dad gaveChromatid 1 Chromatid 2
You
Interphase
Mitosis Meiosis
Asexual reproduction: identical cells
Involved in Sexual reproduction:
Produces genetically unique cells
Results in Diploid cells
Results in Haploid cells
Diploid Cell – Cell that has 2 copies of each chromosome (2n).
Haploid Cell – Cell that has 1 copy of each chromosome (n).
Spermatogonia• Diploid cells in testies of
males produce sperm
Oogonia• Diploid cells in ovary of
females make eggs
Meiosis
“Houston, we have touchdown”
Zygote- A fertilized egg
Please leave the lab in the bag.Thank you
Teacher
• Using whiteboards and chromosome beads. Ask questions and have 1 student draw and hold up board. Other represent with beads.
12. What process is this
Meiosis
13. What is another name for asexual reproduction
Mitosis
14. Draw a Diploid cell showing chromosome 1 inside it.
2n
15. Draw a Haploid cell showing chromosome 1 inside it.
n
16. What is produced when an egg and a sperm combine?
Zygote
17. What is meiosis called when it occurs in females?
Oogonia
18. How many chromosomes does a human have?
19. Draw Meiosis using chromosome 1 and 2
20. Using only 1 chromosome, draw a picture of a Karyotype for a diploid cell.