Homeotic genesa. encode transcription factors that control the expression of genes responsible for specific anatomical structures.b. are found only in Drosophila and other arthropods.c. are the only genes that contain the homeobox domain.d. encode proteins that form anatomical structures in the fly.

(c)In the human sequence, underline any amino acid that differs from the sequence for the chimpanzee, gorilla, and rhesus monkey.

(b)In the sequence for the mouse, circle any amino acid that differs from the sequence for the chimpanzee, gorilla, and rhesus monkey. Then draw a box around any amino acid that differs from the human sequence.

Bioinformatics includes all of the following excepta. using computer programs to align DNA sequences.b. using DNA technology to combine DNA from two different sources in a test tube.c. developing computer-based tools for genome analysis.d.using mathematical tools to make sense of biological systems.

Anton van Leeuwenhoek made an important contribution to the development of the cell theory. How?a. He articulated that all organisms are made of cells.b. He articulated that all cells come from preexisting cells.c. He invented the first microscope and saw the first cell.d. He invented more powerful microscopes and was the first to describe the diversity of cells

What does it mean to say that experimental conditions are controlled? Select True or False for each statement.T/F The test groups consist of the same individuals.T/F The null hypothesis is correct.T/F There is no difference in outcome between the control and experimental treatment.T/F All physical conditions except for one are identical for all groups tested.

Two eukaryotic proteins have one domain in common but are otherwise very different. Which of the following processes is most likely to have contributed to this similarity?a. gene duplicationb. alternative splicingc. exon shufflingd. random point mutations

What is a homeotic mutant?a. an individual with a structure located in the wrong placeb. an individual with an abnormal head-to-tail axisc. an individual that is missing segmentsd. an individual with double the normal number of structures

A homeotic gene does which of the following?a. It serves as the ultimate control for prokaryotic operons.b. It regulates the expression of groups of other genes during development.c. It represses the histone proteins in eukaryotic chromosomes.d. It helps splice mRNA after transcription.