A) control the differentiation of alternating segments of the embryo. B) control the differentiation of the most anterior and posterior segments. C) control the differentiation of a contiguous group of segments. D) are a synonym for homeotic genes. A) control the differentiation of alternating segments of the embryo. B) control the differentiation of the most anterior and posterior segments. C) control the differentiation of a contiguous group of segments. D) are a synonym for homeotic genes.

Exam 20: Genes and Development

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A strain of Drosophila carrying a normal Pax6 gene and also the X-linked gene for white eyes is engineered to express Pax6 in its antennae. What is the phenotype of the resulting flies?

(Multiple Choice)

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Question 81

What floral organs would develop in Arabidopsis flower whorls 1, 2, 3, and 4 (in that order) in a mutant in which activity A was expressed in whorls 1, 2, and 3 and C was expressed only in whorl 4?

(Multiple Choice)

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Question 82

Molecules that are similar in sequence among distantly related organisms, such as many transcription factors important in development, are evolutionarily conserved.

(True/False)

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Question 83

As cells become differentiated, they delete the DNA for genes they no longer need.

(True/False)

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Question 84

Following implantation, the multiplying cells of the human embryo reorganize to form a gastrula, which contains the three germ layers.

(True/False)

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Question 85

A IuIation in a receptor ligand-binding domain may have effects on transcription.

(True/False)

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Question 86

Which of the following CORRECTLY orders the sequence in which genes controlling the development of the anterior-posterior axis of Drosophila larvae are expressed?

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Question 87

Gap genes:

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Question 88

A new mutation is discovered in Drosophila in which alternate larval segments are missing. What kind of gene is it?

(Multiple Choice)

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Question 89

In vulval development in Caenorhabditis elegans (a soil nematode), the progenitor cell nearest to the anchor cell is exposed to the highest concentration of epidermal growth factor and activation of its EGF receptor promotes type 1 cell differentiation. The type 1 cell then prevents type 1 differentiation in adjacent progenitor cells, a mechanism called:

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Question 90

Bicoid _____ caudal mRNA translation.

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Question 91

During the development of the vulva in Caenorhabditis elegans, when EGF binds an EGF receptor on a progenitor cell:

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Question 92

Signal transduction in development is often amplified by:

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Question 93

When the Pax6 gene from a mouse is introduced into a Drosophila genome, it induces eye development. The eyes appear to be _____ eyes.

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Question 94

The fertilized egg is also called a(n):

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Question 95

Which of the following BEST describes the structural and functional relationships between the Notch ligand and the Notch receptor proteins in C. elegans?

(Multiple Choice)

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Question 96

Gene regulation during development is _, which means that _.

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Question 97

In Drosophila development, in which order are the following classes of genes expressed?

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Question 98

Combinatorial control is a general principle for the regulation of gene transcription and is observed in many stages of development in all multicellular organisms.

(True/False)

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Question 99

What would you expect to happen if APETALA-2 instead of AGAMOUS were present in whorl 4 of an Arabidopsis floral meristem?

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Question 100

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Exam 20: Genes and Development

A strain of Drosophila carrying a normal Pax6 gene and also the X-linked gene for white eyes is engineered to express Pax6 in its antennae. What is the phenotype of the resulting flies?

What floral organs would develop in Arabidopsis flower whorls 1, 2, 3, and 4 (in that order) in a mutant in which activity A was expressed in whorls 1, 2, and 3 and C was expressed only in whorl 4?

Molecules that are similar in sequence among distantly related organisms, such as many transcription factors important in development, are evolutionarily conserved.

As cells become differentiated, they delete the DNA for genes they no longer need.

Following implantation, the multiplying cells of the human embryo reorganize to form a gastrula, which contains the three germ layers.

A IuIation in a receptor ligand-binding domain may have effects on transcription.

Which of the following CORRECTLY orders the sequence in which genes controlling the development of the anterior-posterior axis of Drosophila larvae are expressed?

Gap genes:

A new mutation is discovered in Drosophila in which alternate larval segments are missing. What kind of gene is it?

Bicoid _____ caudal mRNA translation.

During the development of the vulva in Caenorhabditis elegans, when EGF binds an EGF receptor on a progenitor cell:

Signal transduction in development is often amplified by:

When the Pax6 gene from a mouse is introduced into a Drosophila genome, it induces eye development. The eyes appear to be _____ eyes.

The fertilized egg is also called a(n):

Which of the following BEST describes the structural and functional relationships between the Notch ligand and the Notch receptor proteins in C. elegans?

Gene regulation during development is _____, which means that _____.

In Drosophila development, in which order are the following classes of genes expressed?

Combinatorial control is a general principle for the regulation of gene transcription and is observed in many stages of development in all multicellular organisms.

What would you expect to happen if APETALA-2 instead of AGAMOUS were present in whorl 4 of an Arabidopsis floral meristem?

Life: Chemical, Cellular, and Evolutionary Foundations

The Molecules of Life

Nucleic Acids and Transcription

Translation and Protein Structure

Organizing Principles: Lipids, Membranes, and Cell Compartments

Making Life Work: Capturing and Using Energy

Cellular Respiration: Harvesting Energy From Carbohydrates and Other Fuel Molecules

Photosynthesis: Using Sunlight to Build Carbohydrates

Cell Signaling

Cell and Tissue Architecture: Cytoskeleton, Cell Junctions, and Extracellular Matrix

Cell Division: Variations, Regulation, and Cancer

Dna Replication and Manipulation

Genomes

Mutation and Dna Repair

Genetic Variation

Mendelian Inheritance

Inheritance of Sex Chromosomes, Linked Genes, and Organelles

The Genetic and Environmental Basis of Complex Traits

Genetic and Epigenetic Regulation

Evolution: How Genotypes and Phenotypes Change Over Time

Species and Speciation

Evolutionary Patterns: Phylogeny and Fossils

Human Origins and Evolution

Cycling Carbon

Bacteria and Archaea

Eukaryotic Cells: Origins and Diversity

Being Multicellular

Plant Structure and Function: Moving Photosynthesis Onto Land

Plant Reproduction: Finding Mates and Dispersing Young

Plant Growth and Development

Plant Defense: Keeping the World Green

Plant Diversity

Fungi: Structure, Function, and Diversity

Animal Nervous Systems

Animal Sensory Systems and Brain Function

Animal Movement: Muscles and Skeletons

Animal Endocrine Systems

Animal Cardiovascular and Respiratory Systems

Animal Metabolism, Nutrition, and Digestion

Animal Renal Systems: Water and Waste

Animal Reproduction and Development

Animal Immune Systems

Animal Diversity

Animal Behavior

Population Ecology

Species Interactions, Communities, and Ecosystems

Biomes and Global Ecology

The Anthropocene: Humans As a Planetary Force

Filters

Gene regulation during development is _, which means that _.