1. DNA Review DNA – genetic material
Chromosomes – condensed DNA
46 total (23 from each parent )
Gene – parts of DNA, control protein synthesis
Smallest Largest
Nucleotide, Gene, chromosomes
EVERY human body cell (except egg or sperm cell) has 46 chromosomes.
23 from mom and 23 from dad

2. Types of Cells Somatic – regular cells Gametes – sex cells
Skin, muscle, bone
46 chromosomes
diploid
Gametes – sex cells
Eggs and sperm
23 chromosomes
haploid

6. Now we line them up by SIZE and PATTERN

7. End Result = A Karyotype!
What can we learn?
# of chromosomes
Gender
Disorders
Haploid/diploid

8. Pairs of chromosomes are called homologous pairs
Each pair carries different versions of same gene (traits!)

9. Autosome = Chromosomes #1-44
Sex = Chromosomes #45 & 46
Called “sex” b/c they determine gender

10. Diploid = TWO chromosomes per number (2n)
Haploid = ½ of total # of chromosomes (23 in humans); ONE chromosome per number (n)

11. Haploid or Diploid?

12. Haploid or Diploid?

13. Circle ONE Homologous Pair

14. Label: Sex Chromosomes

15. What are three factors involved in getting cancer?
Agenda for Wednesday April 20th
Quiz
Karyotypes

16. Where is DNA located?
Agenda For
Karyotype notes
Karyotype activity

17. Is this haploid or diploid? Is it male or female?
Agenda for Thursday April 21st
Karyotype activity
Test next Thursday