Compare and contrast: Use what you know about meiosis and mitosis to fill in the table.
Characteristic
MITOSIS
MEIOSIS
When is it used?
How many daughter cells are
created?
Number of chromosomes
compared to parent cell.
Number of divisions.
Types of new cells created.
(haploid or diploid)
11—5 Linkage and Gene Maps
1. What was the major discovery made by Thomas Hunt Morgan about linkage?
_______________________________________________________________________________
_______________________________________________________________________________
2. What organism did Morgan study? __________________________________
3. What is a gene map? ____________________________________________________________
4. Compare the proximity of genes on a chromosome to their likelihood of being separated by
crossing over.
________________________________________________________________________________
________________________________________________________________________________
5. How does crossing-over make gene mapping possible?
________________________________________________________________________________
________________________________________________________________________________
6. Explain how the law of independent assortment is now applied to organisms based on Morgan’s
research.
________________________________________________________________________________
________________________________________________________________________________
Name ___________________________________ Per ______
Meiosis and Gene Linkage
11—4 Meiosis
1. What are the two requirements of Mendel’s laws of genetics?
A. ______________________________________________________________________________
B. ______________________________________________________________________________
2. What are homologous chromosomes?
________________________________________________________________________________
________________________________________________________________________________
3. How do homologous chromosomes relate to a cell being diploid?
________________________________________________________________________________
________________________________________________________________________________
4. What is haploid? What kinds of cells are usually haploid?
________________________________________________________________________________
________________________________________________________________________________
5. Define meiosis. _________________________________________________________________
________________________________________________________________________________
6. What is crossing over?
________________________________________________________________________________
________________________________________________________________________________
7. In what stage of meiosis does crossing over occur? ___________________________
8. How is gamete formation different in males vs. females?
________________________________________________________________________________
________________________________________________________________________________
9. In human cells 2N = 46. How many chromosomes would you find in:
Sperm __________
Egg cell ____________
white blood cell ___________