SBI3U - Assigned In-Class / Homework
Tuesday, March 2, 2010
Read section 5.2:
Meiosis (pages 131-142)
Complete the following Table:
Number of
Chromosomes in
Daughter Cells
of Mitosis
Diploid
Number
Human
Haploid
Number
Number of Pairs
of Homologous
Chromosomes
Number of Chromosomes Present in
Meiosis at Beginning of Each Phase
Prophase I
Prophase
Telophase
II
II
23
Chimpanzee
24
Yeast
32
Rhesus
Monkey
Dog
21
78
Cat
19
Potato
Mosquito
24
6
What process is taking place (Be Specific) in the following
Figure?
Describe this process and describe where it can occur?
Define the Following Terms: Aneuploidy (i.e.: Down Syndrome)
Polyploidy
Using the process of Meiosis, demonstrate how aneuploidy and polyploidy can occur.
The following is a Figure of a Normal Human Karyotype
(page 186 of text). What sex is the individual and why?
What would the opposite sexes karyotype look like?
Label the following Human Karyotypes as: Monosomy, Trisomy and Triploidy and give a reason why you
named them the way you did:
Describe the type of Chromosomal mistakes that have taken place in the following Figures:
Understand Table 5.2: Mitosis and Meiosis Comparison.
Starting with a cell that is diploid (2n = 6), demonstrate using 3 alleles per chromosome (see definition of
alleles page 157), how all 4 haploid cells are different genetically from their parent cell. (Use the traits below
to demonstrate) – need to incorporate Random Assortment and Crossing-over.
i.e.: chromosome 1 / 2 :
Blue (b) eyes vs Brown (B) eyes;
Tall (T) vs Short (t);
Tongue Roller (R) vs Non-tongue roller (r)
chromosome 3 / 4:
Have freckles (F) vs No freckles (f)
Widow’s peak (W) vs Straight hair line (w)
Free-hanging earlobe (E) vs Attached earlobe (e)
chromosome 5 / 6:
Cleft chin (C) vs No cleft chin (c)
Hitchhiker’s thumb (H) vs straight thumb (h)
Dimples (D) vs No dimples (d)
Define: Cancer
What is the difference between a Benign tumour and a Malignant tumour. Why is a
malignant tumour more dangerous than a benign tumour?
Answer Page 142:
Understanding Concepts:
Applying Inquiry/Communication Skills:
Read Section 5.3:
3, 4, 6, 7, 9
11, 12
Sexual versus Asexual Reproduction (Pages 143 – 146)
Answer Page 146:
Understanding Concepts:
Applying Inquiry/Communication Skills:
1, 2, 6
7