What are homeotic genes and what is the “homeobox” contained in such genes? What is the function of the homeobox? What are Hox genes? What is the significance of their apparently universal occurrence in animals?

Q: Is the type and pattern of the cleave of an egg the same to all species of animals?

A: During the mitotic division, the cytoplasm of the egg is divided into multiple parts which then…

Q: How might differential expression of and regulation by Hox genes contribute to mosaic evolution in…

A: Genome is the complete set of genetic content present in a cell. A gene is a stretch of nucleotides…

Q: How is the mesoderm(third germ layer) oftriploblastic animals formed?

A: The germ layers develop early in embryonic life, through the process of gastrulation. Triploblastic…

Q: What are placental mammal ? Explain the role of  placental mammal ?

A: Placental mammals are a diverse group, with nearly 4000 species described, the majority of which are…

Q: What are the main orders of placental mammals? What are some representative species and…

A: The orders into that placental mammals are divided are the following: Artiodactyls, mammals with a…

Q: What are the main orders of placental mammals? What are some representative species and…

A: Introduction In this question we have to discuss about the main orders of placental mammal.

Q: How are mammalian extraembryonic membranes formed?

A: The layers encircling the embryo inside the uterus are known as extraembryonic membranes. The…

Q: The following are true of Hox genes, except O A. highly conserved family of genes among animals O B.…

A: The Hox genes are a conserved gene family in animals that defines the patterns and segmentation of…

Q: Which of the following feature is exclusively present in members of class Mammalia? 1.Pulmonary…

A: The phylum chordates or vertebrates come under kingdom Animalia that include animals with backbone…

Q: Why is there a shorter lactation period in eutherians compared to marsupials?

A: Marsupials are the animals that are born immaturely and are carried by their mothers in their…

Q: During the embryological development of chordates, the midline dorsal layer of ectoderm folds in on…

A: In humans (a chordate), by the end of the third week of gestation, three basic germ layers…

Q: In mammals, distinguish and differentiate the following germinal layers. Identify the organs that…

A: Introduction :- Mesoderm interacts with endoderm and ectoderm during organogenesis to give rise to…

Q: What is the function of the notochord? What organisms possess notochords throughout their lives and…

A: Numerous organisms are present on the phase of earth. Some are simple organisms, while some are…

Q: Development of an animal is controlled by the genes that are expressed during development. What…

A: Hox genes are members of the homeotic transcription factor family that play a key role in…

Q: what characteristics are shared among bird embryos, pig embryos, and human embryos?

A: There are several similarities between the embryos of different species of animals and birds. It was…

Q: What are the molecules being secreted by the organizer in a regional fashion such that the first…

A: Development of embryo -- The development in developmental biology gave a milestone by the discovery…

Q: n the ventral surface of the embryo     series of tissue blocks lateral to the neural tube     a…

A: somures eventually differentiate into dermis, skeletal muscle, cartilage, tendons, and vertebrae.

Q: What is the role of segmentation and tagmatization in the evolutionary success of the arthropods?

A:

Q: Which of the following occurs to the blastocoel during Xenopus development?     is replaced by the…

A: Xenopus It refers to the genus of highly aquatic frogs that are mostly found in the regions of…

Q: What is significant about Homo erectus in the human lineage

A: Homo erectus  was the first of our relatives to have human-like body proportions, with shorter arms…

Q: What are the silent features of different phyla in the animal kingdom?

A: The multicellular eukaryotic organisms called metazoa form the biological kingdom, Animalia. The…

Q: Why is it likely that Hox genes have played a major rolein the evolution of novel morphological…

A: The Hox proteins are involved in the transcription factor discovered from Drosophila which govern…

Q: What happens to the tail of an Adolescent frog before it is a fully grown adult?

A: Answer: When the tadpole reaches the froglet stage, it is almost a full adult. At this point, the…

Q: In what ways do a bull’s reproductive organ structures differ from that of the human? How are the…

A: The reproductive system(male and female) is a complex system with a number of interconnected…

Q: Briefly explain how and why the yolk distribution in mammalian eggs has changed from their…

A: According to Bartleby expert, when multiple questions are posted we are allowed to answer the first…

Q: Which of the following organisms would have 4 copies of the Hox genes?     lancelets     lamprey…

A: Hox genes are also known as homeotic genes . Hox genes code for transcription factor that play…

Q: are the essential similarities and differences between the development of sperms and eggs in mammals

A: Both sperm and ovum are haploid having 'n' number of chromosome.  Both undergoes mitosis as well as…

Q: What are the four extraembryonic membranes of amniotic eggs of birds and other reptiles and what is…

A: Step 1 Extraembryonic membranes are those membranes that surround the embryo of terrestrial…

Q: Can the dorsal lip of the blastopore inducecells in another part of the amphibian embryoto change…

A: The dorsal lip of a blastopore is a structure formed during the early development of the embryo. The…

Q: What structures are derived from the ectoderm, mesoderm, and the endoderm?

A: Embryology is the study of development and growth of fertilized egg(zygote) into mature embryo. The…

Q: While the aminotic egg offers many advantageous, it also has limitations. Which of the following is…

A: The evolution of the amniotic egg is one of the most important evolutionary steps which leads to the…

Q: What is the fate of the four extraembryonic membranes in embryos of placental mammals?

A: Any of the tissues, derived from the fertilized egg, that encase or in any case add to the help of…

Q: What is the purpose of studying the physiological mechanism of the animal on the eco-physiological…

A:

Q: What is the function of the Pax 6 gene in the mouse eye reference to HOX gene

A: During early embryonic development, homeodomain proteins regulate gene expression and cell…

Q: What are the consequences of the differences in the yolk amount and distribution of eggs among…

A: The amount and distribution of yolk inside the egg decides the pattern of cleavage. The type of…

Q: What does radial symmetry means? What is the type of symmetry found in chordates? Which are other…

A: The animals are the most abundant living organism that is found in almost every habitat. They have…

Q: What does Singer think is more valuable, a human embryo or the life of an ape? How does he justify…

A: Peter singer is a prominent australian philosopher currently at princeton university who many…

Q: y define budding, fragmentation, and parthenogenesis, and provide some examples of animals that use…

A: Asexual reproduction is a type of reproduction that does not include the combining of gametes or a…

Q: How are growth and development controlled in insects?

A: Insects are categorized as arthropods.

Q: What are the similarities and differences between insects that go through com- plete metamorphosis…

A: The vast majority of people are acquainted with complete metamorphosis in childhood as a butterfly…

Q: How are the clock and the determination front connected to the role of Hox genes?

A: Developmental processes in vertebrates are regulated by genes.

Q: To what extent has mesoderm migrated in the blastoderm of the 24 hour chick embryo

A: After twenty-one days of incubation, a chick emerges from a fertile egg. On the surface of the yolk,…

Q: What is the relationship of the bats' status hibernation in the physiological mechanism with the…

A: Hibernation involves an extreme reduction in metabolic rate , heart rate and respiratory rate that…

Q: Which stage of chimpanzee development is most similar to adult Ardipithecus ramidus? To adult…

A: Introduction :- Evolution is defined as the descent with modifications and it is a never ending or a…