The anterior–posterior axis of a Drosophila embryo is first established by certain (a) homeotic genes (b) maternal effect genes (c) segmentation genes (d) proto-oncogenes (e) pair–rule genes

Q: What is the difference between a maternal-effect gene and a zygotic gene? Of the following genes…

A: Genes are the basic biological unit of heredity. They are a segment of deoxyribonucleic acid (DNA)…

Q: Compare and contrast how maternal-effect genes, gap genes, and homeotic genes affect Drosophila…

A: Homeotic genes are the class of genes present in Drosophila that direct the development of the…

Q: given a situation in which you manipulated a zebrafish embryo by injecting high levels of retinoic…

A: Embryology is the branch of biology that studies the development of an organism from the fertilized…

Q: Describe key events in early Drosophila developmentthat occur before segmentation is first apparent.

A: The life cycle of drosophila consists of various stages like embryogenesis, larval stage, pupal…

Q: You are interested in the expression of regions of the X chromosome at different times in human…

A: The investigation of the X chromosome at different phases of human fetal development is a complex…

Q: Which of the following statement(s) is/are true with regard to positional information in Drosophila?…

A: Positional information is a signal which is received by each and every cell of the body in an…

Q: Compare and contrast the experimental advantages and disadvantages of Drosophila, C. elegans,…

A: Model organisms are non-human species that are used to conduct experiments in the laboratories as…

Q: Cleavage divides the eggs of vertebrates and many other animals into a cluster of separate cells. By…

A: An embryo in development is an excellent example of intricate biological self-organization and…

Q: You discover a new Drosophila mutant in which mouthparts are located where the antennae are normally…

A: In Drosophila there are large genes which help in formation of body parts and forming body axis .

Q: Describe the relationship between homeotic genes in Drosophila and in mice.

A: Homeotic genes are the regulatory genes that play an important role in the regulation of the…

Q: Two normal-looking fruit flies were crossed and, in their progeny, there were 202 females and 98…

A: •The proportion 202 and 98 of females to male fruit fly progeny is compatible with the ratio 2 : 1.…

Q: You have identified a Drosophila gene that is expressed exclusively in the odd-numbered "stripes" in…

A: A loss-of-function mutation is a type of genetic mutation that disrupts the normal function of a…

Q: The phenotype of a heterozygous mouse (Aa) is agouti.  The agouti banding pattern is due to altered…

A: * Homozygous dominant and Heterozygous will produce agouti that is AA or Aa respectively  and the…

Q: You would expect to find a synaptonemal complex in a cell at (a) mitotic prophase (b) meiotic…

A: Cell division is a basic life process in Living organisms. It can be of two types: Mitosis and…

Q: What complications might arise from genetic screens targeting an organ that differentiates late in…

A: The eye has been one of the most intensively studied organs in Drosophila. The wealth of knowledge…

Q: Which of the following illustrates the regulative nature of early mouse development? (a) the mouse…

A: The mouse has been used as a model organism to study the development of mammals.

Q: What will be the effect on sexual development in newly fertilized Drosophila embryos if the…

A: Sex determination in drosophila melanogaster is done by balancing the male determinants on the…

Q: Removing the patch of tissue called the ZPA from one limb bud and placing into onto another…

A: ZPA is a zone of polarising activity, gives molecular signaling during limb formation in…

Q: A drug causes the degradation of Cactus protein. What would be the effect of administering this drug…

A:

Q: EXTRANUCLEAR INHERITANCE In drosophila, a recessive mutation (m-) of a maternal effect gene (MEG)…

A: Introduction  Maternal effect genes are required in emvryo development in  drosophila. Maternal…

Q: Explain how loss-of-function mutations in the following categories of genes would affect the…

A: Drosophila is also called fruit-fly. It is often used as a model for biological investigations.

Q: Give examples of genes that affect development in fruit flies by regulating gene expression at the…

A: Gene is a functional unit of heredity. A gene is a sequence of nucleotides in genome that codes for…

Q: explain Position-effect variegation in Drosophila?

A: Mutation is defined as the permanent change or alterations happening in the sequence of the DNA of…

Q: Some people with neurofibromatosis develop blemishes on their skin, while others are severely…

A: Neurofibromatosis is a genetic disorder that causes tumors to form on nerve tissue. These tumors can…

Q: What are the relative merits of Drosophila, C. elegans, M. musculus, and Arabidopsis as model…

A: Model organisms are employed in research experiments to study a specific phenomenon where the…

Q: An inherited disorder caused by a defective or absent enzyme is called (a) a karyotype (b) trisomy…

A: Introduction:- Inherited metabolic diseases are a group of medical problems caused by genetic flaws…

Q: Which of the following is NOT true regarding Hox genes.     A) The sequence they appear in their…

A: Hox genes: Hox genes are a group of similar genes that define parts of an embryo's structure along…

Q: You inject bicoid MRNA into the posterior end of a fertilized fruit fly egg just prior to the first…

A: Drosophila refers to the genus of flies that is commonly called fruit flies. It is a small fly seen…