Exam 14: Genes, Development, and Evolution

Mutations in the disheveled gene in Drosophila can lead to various defects in the hairs of the thorax of adult flies,along with misshapen wings.These morphological abnormalities arise because of improper determination of the boundaries of individual segments during the fly's early development.Based on this information,disheveled is most likely a _______ gene.

The differentiation of whorls in the flower-forming region of the plant Arabidopsis thaliana is regulated by _______ genes.

Differences in the expression of the gene _______ account for many of the phenotypic differences between freshwater and marine forms of three-spine sticklebacks.

Which statement about developmental processes is true?

Cell division and _______ are the major processes that lead to growth.

Different results are achieved when an eight-cell sea urchin embryo is bisected horizontally as opposed to when it is bisected vertically.This observation supports which statement?

Which statement about the organ identity genes in Arabidopsis thaliana is true?

The segregation of cytoplasmic determinants to certain regions within the sea urchin egg cytoplasm is aided in part by

In the diagram below,the cell(s)being induced is/are labeled _______ and the inducer is labeled _______.

Wings evolved independently in vertebrates _______ times.

Which statement best describes the differences between embryonic and induced pluripotent stem (iPS)cells?

Which technique or study would be most useful in testing the hypothesis that "the fate of the cells in an early fish embryo is irrevocably determined"?

The differences between marine and freshwater sticklebacks

A word derived from the Greek for "origin of form," _______,refers to the process by which differentiated cells are shaped into the multicellular body and all its organs.

The _______ thoracic segment of Drosophila bears small outgrowths called halteres that aid in _______.

Female Drosophila that are homozygous for a mutant form of the bicoid maternal effect gene produce eggs that,when fertilized,develop into larvae with no head or thorax.Which procedure would most likely lead to restoration of normal development in one of these mutant eggs?

Which of the following would provide the best evidence for genomic equivalence of all cells within an organism?

Before a differentiated plant cell can become totipotent,it must

Which type of cell is most likely to be totipotent?

Which statement about cloned animals is true?