Linkage and Crossing Over

1. Why is not Mendel’s second
law always valid for two or
more phenotypical traits of an
individual?
2. Why is drosophila a
convenient animal for the
study of linked genes?
3. What is linkage?
4. What is crossing over? How
is meiosis related to this
phenomenon?
5. In genetic recombination by
crossing over what is the
difference between parental
gametes and recombinant
gametes?
6. What is recombination
frequency?
7. Why does the
recombination frequency of
genes vary with the distance
between them in the
chromosome?
8. What is a centimorgan?
9. How can the concept of
recombination frequency be
used in genetic mapping?
10. Is crossing over important
for the diversity of biological
evolution?