In your own words, describe how the treehoppers got their unique helmets.
originally the helmet was an extra appendange, ancestral insects had 3 pairs of wings, the genes were still there, they just needed to be turned on
Now that you know everything you need to know about HOX genes, explain why they are so important to biologists and their connection to the Theory of Evolution by Natural Selection.
HOx genes provide an explanation for how major changes can occur within a species in a relatively short period of time, like the loss of segments or the addition of new segments or appendages
Homeobox Genes are Master Genes that Control Basic Body Plans KEY
go to : http://www.dnaftb.org/37/ - go to animation
1. What are the stages of fruit fly development? egg, larva, pupa, adult
2. What is a "gap" gene? map head, thorax, and abdomen
3. What is a pair-rule gene? specify the formation of segments
4. Why is it likely that ancestors of fruit flies had 2 pair of wings? What gene causes them to have only one pair of wings? they have turned off the formation of a second pair of wings in segment #3 due to the Ubx gene.
5. What are hox genes? What might occur if a hox gene mutated?
homeobox or hox genes control the formation of major body segments and body orientation
6. Describe each of the following mutant flies:
kruppel mutant - missing a thorax
fushi tarazu mutant - missing every other segment
Ubx mutant - has an extra pair of wings
Antp mutant - legs instead of antenna
Go to the link: "problem"
7. What will happen to an embryo that doesn't have BICOID protein?
anterior structures will not form, embryo dies
8. What will happen if BICOID is overexpressed? more anterior structures form
9. What kind of gene is HAIRY? pair rule gene
10. What kind of gene is EYELESS? homeotic