20 Questions
Which genes control the spatial organization of body parts?
Homeotic genes
What is the role of Hox genes in animal development?
Provide positional information
How did six-legged insects likely evolve from a many-legged crustacean ancestor?
Changes in the Hox gene Ubx
What is the likely role of new developmental genes arising from gene duplication events?
Facilitate the origin of novel morphological forms
What causes the loss of spines in lake stickleback fish?
Differences in gene regulation compared to marine sticklebacks
What can regulatory changes in developmental genes be limited to?
Individual cell types
What is the likely role of changes in the regulation of developmental genes in the evolution of body form?
Important role
What are homeotic genes?
Master regulatory genes
What is the likely role of Hox genes in the evolution of body form?
Determine body form
What is the likely role of changes in gene sequence in the evolution of body form?
Limited role
Which of the following is an example of heterochrony mentioned in the text?
Changes in the skeletal structure of bat wings
What does paedomorphosis refer to?
The retention of juvenile structures in sexually mature species
In paedomorphosis, how does the rate of reproductive development compare to somatic development?
It accelerates
What can heterochrony alter in terms of reproductive development?
The timing of reproductive development
Which of the following is not an example of heterochrony?
Changes in the relative skull growth rates
What is the result of increased growth rates of finger bones in bat wings?
Changes in the skeletal structure
What is the main focus of the text?
Changes in the skeletal structure of bat wings
What does heterochrony refer to in the context of the text?
Changes in the reproductive development of nonreproductive organs
What is the result of paedomorphosis?
Retention of juvenile structures in sexually mature species
What is the term used to describe the elongated hand and finger bones in a bat wing?
Heterochrony
Test your knowledge on heterochrony and its impact on skeletal structures with this quiz. Explore how changes in rate and timing can result in elongated hand and finger bones in bat wings.
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