Download Karyotype Notes

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
Types of Cells
• Somatic – regular cells
– Skin, muscle, bone
– 46 chromosomes
– diploid
• Gametes – sex cells
– Eggs and sperm
– 23 chromosomes
– haploid
Now we line
them up by SIZE
and PATTERN
• End Result = A Karyotype!
What can we learn?
1.# of chromosomes
2.Gender
3.Disorders
4.Haploid/diploid
Pairs of
chromosomes are
called
Each pair carries
different versions of
same gene (traits!)
Chromosomes #1-44
Chromosomes
#45 & 46

Called “sex” b/c they
determine gender
TWO
chromosomes per
number (2n)
½ of total
# of chromosomes
(23 in humans);
ONE chromosome
per number (n)
Haploid or
Diploid?
Haploid or
Diploid?
Circle ONE Homologous Pair
Label: Sex Chromosomes
What are three factors involved in
getting cancer?
Agenda for Wednesday April 20th
1. Quiz
2. Karyotypes
Where is DNA located?
Agenda For
1. Karyotype notes
2. Karyotype activity
Is this haploid or diploid?
Is it male or female?
Agenda for Thursday
April 21st
1. Karyotype activity
Test next Thursday