proteins and RNA specified by maternal genes accumulate in the  _____  of the oocyte and influence the early development of the embryo.

Q: Fill in the blank:  _________________ is the phase of development during which cellular divisions…

A: The multicellular organisms develop from an early stage called an embryo. Embryonic development…

Q: What are morphogens, exactly? Explain how they affect the patterning of tissue throughout embryonic…

A: Pattern formation is a development process by which the cells acquired different identities…

Q: Fill in the blank:  All essential external and internal body parts are formed during the…

A: Gametes are reproductive cells. In male it is known as sperm and in female it is known as egg or…

Q: What is a yolk? What is its role in fertilization and development?

A: Extraembryonic membrane: The blastoderm in different species like birds, mammals, and reptiles give…

Q: The maternal genome drives the first stage of embryonic development.     True     False

A: In developmental biology, embryonic development, also known as embryogenesis, is the development of…

Q: indicate the stage at which segmentation genes, homeotic genes, and egg-polarity genes would have an…

A: The function of genes is to transfer the information required for the synthesis of proteins. The…

Q: What are some master genes important in embryonic development? Give five (5) only with their…

A: Introduction Master gene is a regulator gene , or gene at the top of gene  regulation hierarchy…

Q: What is the molecular explanation for maternal effect?a. The father’s gene is silenced at…

A: The maternal-effect is the influence on the phenotypic expression in an embryo or progeny due to the…

Q: A human mother's genes seem to influence brain development while a human father's genes seem to…

A: Answer :  Th correct option would be :  the mother imprints her growth genes and the father imprints…

Q: Amniocentesis and genetic screening reveal that a fetus carries a defective L1-CAM gene. What…

A: Amniocentesis and prenatal testing are the diagnostic tests performed before the child's birth. This…

Q: Describe, from fertilization, the major pathways of normal male sex development. Include the stages…

A: Genetic sex  It is determined by the chromosome of the individual. If a person has a Y chromosome…

Q: With regard to primordial germ cells induction, explain how mammals are different from other…

A: The source of heritable genetic variation, are the germ cells. They produce the totipotent zygote…

Q: The development of sex and gender is a good example of a developmental cascade because:   Group of…

A: Developmental Cascade:  Developmental cascades refer to collective influences on the development of…

Q: If a gene is located on the X chromosome of a mammal,it isa. expressed only in females.b. expressed…

A: X-linked recessive traits are expressed more likely in males as they have a single copy of X…

Q: One function of the placenta in a 1 point human is to * (1) Allow nutrients to diffuse from the…

A: Placenta is the structure which is formed by both the fetus and the mother. It release the hormone…

Q: causes a deletion to occur during early fetal development.? is it an alteration

A: If there is deletion or Insertion of one or a few nucleotides in the DNA molecule, then it will…

Q: 4. a. Briefly explain how the mutation in one gene can trigger a cascade of genetic impacts in the…

A: The structure, morphology and behavior of organisms are dependent upon its genes. These genes are…

Q: Stage 1 of labor includes which phases in the correct order? Active, Latent, Transition Transition,…

A: There are four stages of labor, which occur in sequential order and are responsible for some…

Q: .In humans, how does the inheritance of sex-linked traits differ from autosomal traits?

A: A genetically defined trait is one that is inherited. Mendelian genetics dictates that inherited…

Q: Fill in the blank:  A human offspring is called a(an) ___________________ until the end of the…

A: The development of human offspring takes around nine months. The development involves four stages.…

Q: Fetal development takes place in a relatively short amount of time. In just nine months, a…

A: The gestation period of fetal growth in 32 - 40 weeks (9-10 months). The entire gestation period is…

Q: What  similarities  do  the  illustrations  have?  What are the differences?  What trends do you see…

A: Comparing different embryonic stages of different animals is a tool that can be used to infer…

Q: The placenta is a strange, important and interesting tissue because: a. It is made of many cells…

A: Introduction: Placenta is an organ that develops during pregnancy and is found in the uterus. The…

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: You are the product of all the genetic information contained in the fertilized egg cell at the…

A: Sexual reproduction- In this fusion of male and female gamete occurs. In this fusion of two gametes…

Q: what causes activation of certain genes before fertilization?

A: Fertilization is the process of fusion of male and female gametes for the formation of a zygotes.

Q: Can I get clariication on the week 2 to 3 events of development (bilaminar disk; amniotic cavity,…

A: Embryogenesis is the process that refers to the development of the fetus during the first eight…

Q: Fill in the blanks: please use the words provided below each question. each21)…

A: The first developmental stage in Drosophila is pattern formation. It starts with the development of…

Q: 16. A boy has brown hair and brown eyes. His mom has brown hair and his dad has brown eyes. Which…

A: As per the guidelines we are supposed to answer only the first question. Please repost the other…

Q: In mammals, primordial germ cells migration ends when they reach the _________________   posterior…

A: Primordial germ cells (PGCs) are highly specialized cells that act as precursors of gametes, which…

Q: 5 new structures that appeared in the 33-hours chick embryo and indicate the germ layer derivative…

A: The development of a chick embryo can be studied by dissecting the embryo and analyzing various…

Q: 11. A -25- year old pregnant woman is using alcoholic beverages regularly. After consulting a…

A: If mother consumes more amount alcoholic beverages it results in abnormalities in fetus.

Q: Why is it necessary for the egg to have changes leading to polyspermy block during fertilization?

A: The gametes are involved in sexual reproduction. Sexual reproduction occurs in almost all…

Q: As Cleavage stage of embryo genesis proceeds, the developmental potential of the cells becomes…

A:

Q: 7) List 2 processes that the placenta takes over by the end of the first trimester in humans.

A: The placenta takes over the production of progesterone and human chorionic gonadotropin by the end…

Q: Contrast determination and differentiation in development

A: The main difference between cell determination and cell differentiation is that the cell…

Q: Describe how teratogenic agents cause the deformity of the embryo and give specific example. 2.…

A:

Q: Vhich statement best explains why so many variations in coat colors exist? O Each coat color is the…

A: Recombination is a process where DNA segments are broken down from one chromosome and recombined…

Q: At which stage in development would a cell's gene expression not be altered between cell types? a)…

A: Introduction :- Developmental biology allows us to study and observe the changes that takes place…

Q: formation of the limb bud, the components of the zeugopodium develop in the presence of:

A: Limb is very important mechanical organ which performs functions like movement, applying force. limb…

Q: 4. Briefly explain how the mutation in one gene can trigger a cascade of genetic impacts in the…

A: The alteration in the sequence of DNA either due to a mistake during the copying of DNA or because…

Q: what way are sex-limited and sex influenced differ and similar? Limit your answer to not more than…

A: To determine: What way sex-limited and sex influenced differ and similar. Mode of inheritance by…

Q: What causes most of the phenotypic abnormalities in someone with Down's Syndrome? A) They have…

A: Aneuploidy is the condition in which abnormal number of chromosomes are seen in the cell.Normally…

Q: Pregestational genetic diagnosis (PGD) aims at testing embryos before implantation for a given…

A: Pregestational genetic diagnosis (PGD) is one of the method in identifying if any genetic defect…

Q: Discuss and compare the source (mechanism) and types of increased mutations in older mother oocytes…

A: Germline mutation are the mutations that  are present in parent's egg or sperm cells. When an egg…

Q: Explain the importance of meiosis and mitosis in development

A: Mitosis is a process where a single cell divides into two identical daughter cells (cell division).…

Q: 1. .......................... is an increase in the number of normal cells of an organ or tissue.…

A: 1. HYPERTROPHY is an increase in the number of normal cells of an organ or tissue.

Q: If there are 400M ovum/egg cells in a 1point woman's body, how many primary oocytes are there during…

A: An oocyte is essentially an immature egg. Oocytes becomes mature within follicle. These follicles…

Q: True or False?   Presence of Y chromosome along with one X chromosome ensures Beta-catenin…

A: Beta catenin is involved in amphibian  development(embryogenesis) . Amphibian egg (having X…