Exam 25: Evolution of Development

AGAMOUS is a gene that has been implicated in the regulation of stamen formation in Arabidopsis flowers.If this is true, a mutant with a functional AP3 gene but a nonfunctional AGAMOUS gene would

A major biological paradox is that genes are generally highly conserved and yet

Experimental mutations in the timing of Hox gene expression cause lab mice to develop deformed limbs.This is an example of

Genes with similar sequences in two different species, such as humans and mice

An alteration in the timing of a developmental event caused by a genetic mutation is called ________________.

A plant with its floral structures arranged around a central axis has _________________ flowers.

The development of eyes has been intensively studied.Eyes of vertebrates and insects are

The evolution of petals through the AP3 gene is best explained by

A mutation in the transcription factor protein shown, protein T, disrupts the function of its DNA-binding motif.The most likely result of this mutation would be that

The evolution of development of snout-length in cichlid fish is best explained by

The evolution of flower symmetry is best explained by

The Pax6 gene, responsible for initiating lens formation in mice, can be inserted into fruit flies and

The evolution of insect wing patterns is best explained by

(Note the phylogeny is drawn with diagonal branches rather than the rectangular branches seen in the text.) If the stop codon in the Brassica plant CAL gene appeared in the cauliflower lineage after broccoli and cauliflower had diverged from each other, it would be expected that

Most mutations that affect developmental regulatory genes are ________________.

Eyes in mammals and _____________ are examples of convergent evolution.

Eyes in different animal groups arose independently many times,

The gene Brachyury promotes development of the notochord and the vertebrae in vertebrate animals.Among the rodents, most species have a long tail, but capybaras have a very short tail.What is the most likely difference you might expect to see for the Brachyury gene in capybaras compared to long-tailed rodents?

Which animal is likely to have the lowest expression level of a Pax6-like gene?

A protein that binds DNA at a specific promoter or enhancer region in order to regulate RNA production is called a _________________ factor.