Which of the following mechanisms could negatively impact embryo development in humans? a mutation in a master regulator transcription factor needed for prefrontal cortex cell formation the introduction of a toxin that alters the genetic regulatory cascade for ovary development proper functioning of morphogens a failure of apoptosis to target the cells that formed "webbing" between the fingers and toes A, B, and D Which of the following likely has the most Hox genes? Jellyfish Slugs Dolphins Bees Similar gill pouches in embryos of a chick, human, and cat are an example of ) structural homology developmental homology ) genetic homology ) the inheritance of acquired characters

Which of the following mechanisms could negatively impact embryo development in humans? a mutation in a master regulator transcription factor needed for prefrontal cortex cell formation the introduction of a toxin that alters the genetic regulatory cascade for ovary development proper functioning of morphogens a failure of apoptosis to target the cells that formed "webbing" between the fingers and toes A, B, and D Which of the following likely has the most Hox genes? Jellyfish Slugs Dolphins Bees Similar gill pouches in embryos of a chick, human, and cat are an example of ) structural homology developmental homology ) genetic homology ) the inheritance of acquired characters

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter17: Developmental Genetics

Section: Chapter Questions

Problem 12TYU

See similar textbooks

Similar questions

Which of the following does a fate map of an embryo show?A. differences in developmental potential between cellsB. to what tissues cells will contribute later in developmentC. where key signaling centers are locatedD. differences in developmental competence between cells
the ectoderm of a gastrula stage vertebrate embryo, what is the major function of BMP4? a). repress nervous system development b). repress skin development c). promote nervous system development d). promote the onset of gastrulation e). More than one of the above are correct. 2. Which is an essential characteristic of neural stem cells? a) The ability to differentiate into any type of cell b) The ability to dispense with bacteria, damaged neuron, or toxic proteins in the brain c) The ability to guide neurons to their final location d) The ability to suppress the activity of the immune system e) The ability to differentiate into any cell type found in the central nervous system
A cytoplasmic determinant can control development at the early stages of development because....? Group of answer choices a. it is a universal activator of all genes b. it is present evenly throughout the cytoplasm c. it is activated by cell division d. it is controlled by genes present in the cytoplasm e. it is laid down in the egg cell by the mother
The embryos of complex multicellular animals must establish spatial coordinates if development is to proceed. An important reference coordinate for developing frogs is theA. location of the vegetal pole.B. location of the animal pole.C. point of sperm penetration.D. location where gastrulation begins.E. direction of the sun.
Cleavage divides the eggs of vertebrates and many other animals into a cluster of separate cells. By contrast, theequivalent stage in the Drosophila embryo generates a syncytium. How does the presence of a syncytium affectthe early development of Drosophila?
Sexual differentiation begins close to 4 weeks after fertilization, but cannot be seen visually until about 6 weeks post fertilization. All fetuses begin with a ______________________ gonad that is able to become either ovaries or testes, depending on the presence or absence of the Y chromosome. If the Y chromosome is present, a region of the Y chromosome will begin expressing genes that start the process of masculinization of internal structures. This region is known as the ______________________________ region or ___________ for short. The expression of these genes causes the bipotential gonad to develop into the testes. Once the testes have started developing, two hormones, testosterone and Anti-MüllerianHormone are produced. Testosterone causes the _____________________ ducts to develop into the _____________________. Testosterone also causes the internal development of the __________________ and __________________. Anti-Müllerian Hormone causes the ______________________ ducts…
The insect testis is composed of individual units called ____ , whereas the insect ovary is composed of individual units called ovarioles. In the type of ovariole referred to as ____ , the upper region called the germarium contains oogonia and cells called____ , which connect to forming eggs by long ____ that carry maternal mRNA to the egg.
In mice, the copy of the Igf2 gene that is inherited from the mother isnever expressed in her offspring. This happens because the Igf2 genefrom the mothera. always undergoes a mutation that inactivates its function.b. is deleted during oogenesis.c. is deleted during embryonic development.d. is not transcribed in the somatic cells of the offspring.
In flies developing from eggs laid by a nanos−mother, development of the abdomen is inhibited.Flies developing from eggs that have no maternallysupplied hunchback mRNA are normal. Flies developing from eggs laid by a nanos− mother that alsohave no maternally supplied hunchback mRNA arenormal. If too much Hunchback protein accumulatesin the posterior of the egg, abdominal developmentis prevented.a. What do these findings say about the function ofthe Nanos protein and of the hunchback maternallysupplied mRNA?b. What do these findings say about the efficiency ofbiological processes that are subject to evolution?
Which of the following statements is FALSE? a. VegT and Veg1 induce both dorsal and ventral mesoderm. b. Veg1 and VegT induce endoderm signals. c. Beta-catenin must enter the nuclei of cells on the dorsal surface for frog development to progress normally. d. Nodal is required to induce both the Organizer and ventral mesoderm.
Researchers searched for an activator of neural tissue formation. What is the real pathway for this developmental phenomenon? a. Neural tissue formation occurs via BMP inhibition by proteins secreted from the organizer. b. Noggin activates ectoderm to become neural tissue. c. Nodal activation induces mesoderm to make neural tissue. d. Beta-catenin is required for formation of neural tissue.
Name three possible factors contributing to early asymmetries in a developing embryo (i.e. what are the kinds of things early on that lead to the development of the body axes - dn, a/p, l/r, etc)? In the fruit fly drosophila melanogaster, the anterior-to-posterior body axis becomes segmented into distinct regions. explain the role of the genes bicoid and nanos in this process.