How does polyploidy and gene duplication, combined with mutation of HOX genes, lead to complex new characteristics and abilities? Describe the example of globin genes.

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7 Jun 2023

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Related questions

3. What are Hox genes and why are they thought to be important to understanding the evolution of complex adaptions? How are Hox genes related to cascading networks and what happens to those networks if the required Hox genes donât work properly, and why would this be the case? Describe a specific example that demonstrates how an understanding of Hox genes is able to help us understand how a complex adaptation evolved.

QUESTION 1

A dam dividing a fish population will likely lead to sympatricspeciation.

True

False

10 points

QUESTION 2

As certain lineages of animals evolved more and more complexbody plans, what has happened to the Hox genes of theseanimals?

		The number of Hox genes has been reduced
		The more complex the body plan, the greater the number of Hoxgenes.
		Complex body plans have more inactive Hox genes
		There is no correlation between body plan complexity and Hoxgenes

10 points

QUESTION 3

Which of the following would lead to allopatric speciation?

		the colonization of an island by a subset of the mainlandpopulation
		a new river channel dividing beetles into two separatepopulations
		the extinction of a large proportion of a population, leavingonly distant sub-populations
		all of the above

10 points

QUESTION 4

The hybrid sterility of a hinny (cross between a female horseand a male donkey) is an example of

		prezygotic isolation
		allopatric speciation
		sympatric speciation
		postzygotic isolation

Antennae in insects are found only on the head segments. A mutation is known in the red flour beetle Tibolium castaneum in which all body segments bear antennae. Assuming that similar genes control the development of all insects, what general category of gene is likely to be responsible for this mutant phenotype?

Give an example of a phenotype in a vertebrate that is caused by mutation of Hox genes.