How would the external genitals appear on a genetic female rat that lacked alpha-fetoprotein?

Q: Discuss and elaborate thoroughly the statement “oocyte activation involves inactivation” using…

A: In mammals, fertilization involves a series of consecutive steps that starts with the recognition…

Q: Define human placental lactogen?

A: Placenta is the organ which develops in the uterus during pregnancy. It provides oxygen and…

Q: n mosquitoes, (i) Moult inhibiting hormone (MIH) or Juvenile hormone which is most effective. Why?…

A: The molt-inhibiting hormone (MIH) is a neurohormone which exerts an inhibitory effect on the…

Q: What is delayed implantation? Why is it important in marine mammals?

A: It is a reproductive strategy used by approximately 100 different mammals in seven or eight…

Q: Suppose a genome-wide association study (GWAS) investigation found a particular single nucleotide…

A: A sort of genetic difference within humans can be called single nucleotide polymorphisms or SNPs.…

Q: Why Mules Are Sterile?

A: A mule is the offspring of a male jackass and a mare. mares and jackasses are different species,…

Q: Why is a second polar body expelled after fertilisation?   a)   To remove excess cytoplasm   b)…

A: The second polar body is a small, non-functional cell that is produced during oogenesis after the…

Q: What percentage reduction in reproduction does lameness cause in dairy cows?

A: Reproduction refers to the biological process by which new individuals of the same species are…

Q: Why does X inactivation occur in female mammals?

A: A Chromosome is an entire chain of Deoxyribonucleic acid (DNA) with stabilizing proteins. The DNA is…

Q: Why are the protein receptors on the egg cell particularly important among aquatic animals that use…

A: Fertilization is the process in which intermingling of male and female gamete fuse together and form…

Q: Describe the role of the SRY gene in mammalian sexual development.

A: The human male genital or reproductive system has two sections, the external and internal male…

Q: Who discovered Drosophila melanogaster?

A: Drosophila belongs to the family Drosophilidae, whose members are commonly called as small fruit…

Q: Why does X inactivation occur in female mammals?

A: Causes of X inactivation: X-chromosome inactivation usually define through the term that they are…

Q: Describe the cascade of RNA splicing events initiatedby the Sxl protein that results in female…

A: In drosophila, the pre-mRNA undergoes sex-specific splicing to control sex determination. The…

Q: What hypothesis did Masui and Markert propose toexplain the function of progesterone? Explain the…

A: It is a hormone secreted by corpus luteum in the ovary. It plays important role in mensuration cycle…

Q: what is the Chimp-Gene Fusion hypothesis? (Describe in detail the theory and weakness)

A: Chimp-Gene Fusion hypothesis explains that humans have one fewer chromosome pair in their cells than…

Q: If a genetic female fetus is exposed to testosterone in utero, would that individual develop a…

A: Men have noticeably more testosterone on average than women, despite the fact that testosterone is…

Q: Describe the process by which the forespore influences gene expression in the mother cell during…

A: The spore production in bacteria like B. subtilis is a proper nutritional stress events and thus…

Q: Design a simple experiment to confirm that agglutination was due to the binding of the lectins to…

A: Answers agglutination is the aggregation of the particles. This phenomena is commonly observed when…

Q: If β-catenin is originally found throughout the embryo, how does it become localizedspecifically to…

A: The Wnt pathway is one of the signal transduction pathways that are involved in the developmental…

Q: Gradients of morphogens can be preestablished in the oocyte. Also, later in development, morphogens…

A: A substance whose non-uniform distribution governs the tissue development in the pattern formation…

Q: How would you produce a mouse that is homozygous fora rat growth-hormone transgene?

A: Introduction: Transgenic animals are the animals that have had a foreign gene deliberately inserted…

Q: How does the germ layer derivatives develop in mammals and reptiles? Make a comparison.

A: A germ layer is a multilayered cell that develops throughout the embryonic development process.…

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: The vast majority of mRNA placed into the developing oocyte do NOT get translated until after…

A: Introduction  mRNA stands for messenger RNA, which is a type of RNA molecule that plays a crucial…

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: What specific observations (evidence) support the conclusions about sex determination in Drosophila…

A: BASIC INFORMATION SEX DETERMINATION  It is basically the establishment of the gender of an…

Q: Describe the role of the SRY gene in mammalian sexual development.

A: The exterior and internal male genitalia comprise the human male genital or reproductive system. The…

Q: How do fruit fly maternal effect genes determine thepolarity of the egg and the embryo?

A: Drosophila melanogaster is generally known as the common fruit fly. It belongs to the family…

Q: What is the action of the Sxl protein in females?

A: There are different regulatory proteins are present in both male and female. The RNA-binding protein…

Q: How does oviposition occurs in female frugs. Provide the pathway involved in the oviposition process

A: The female reproductive system consists of ovaries and oviducts. A pair of ovaries located near the…

Q: What evidence do the authors provide to suggest that the interaction between Izumo1 and Juno is an…

A: Juno–Izumo binding is required for fertilisation and may have a role in polyspermy membrane…

Dissection

Dissection is the process of cutting up the tissue of a dead or live animal or plant, to do anatomical studies and surgical treatments. The purpose of dissection is to learn more about the overall structure of organs and organ systems and thereby understand the physiology of the organism.