viernes, 9 de agosto de 2013

Genetic Tool Kit

What do homeobox genes code for in animals?
They produce basic body parts, such as wings, legs and heads, in all animals.
Why are homeobox (also called homeotic) genes called the master control genes, or master switches?
Because the research indicates that animals descended from a single common ancestor that passed along to them a set of homeobox genes, used to build a wide variety of forms from just a few basic body plans.
What other organisms besides fruit flies have homeobox genes?
Every animal has homeobox genes.
What did the experiment with fruit flies and mice show?
That every animal may have evolved from a common ancestor, which means that evolution is a simpler process than it was thought.
What does the presence packages of information suggest about evolution?
That genes are the same, but external factors determine different evolution conditions, which makes organs differentiate among animals. This means that evolution is triggered by external factors such as food, weather, etc.
How has evolution tinkered with genes of animals?
Evolution can be considered to be the process in which new combinations of genes are created, commonly triggered by external changes.
What role has embryos played in the study of evolution?
They have been the main study object because during this stage genes start to be expressed and scientist can study the similes between different species.

No hay comentarios:

Publicar un comentario