A morphogen______ . a. is a master regulator gene b. has different effects at different concentrations c. maintains the placenta d. kills bacteria

Q: A chemical that can cause a birth defect is aa. toxin.b. trisomy.c. mutagen.d. teratogen.

A: Answer is a.)  toxin.

Q: Morphogens area. molecules that disrupt normal development.b. molecules that convey positional…

A: Mutagenic agents are the agents that cause heritable and reversible changes or mutations in the…

Q: is the transmission of DNA to offspring. O a. Development b. Homeostasis c. Inheritance d.…

A: Reproduction is a way by which new generation is delivered by the inclusion of male and female sex…

Q: A preembryo has:- a. A neural tube. b. A heart bulge. c. A cytotrophoblast. d. A coelom. e. decidual…

A: Cell denotes the primary structural and functional unit of all living organisms. Scientists…

Q: A Drosophila egg that is bed lbcd may develop normally, but the adult fruit fly will not be able to…

A: Bicoid genes The bicoid gene or the bcd genes in drosophila are important genes that control the…

Q: ''As development progresses, individual cellsbecome more and more restricted in the range of cell…

A: Cells are the basic unit of life. They are often known as "building blocks of the body" and exhibit…

Q: ___________ are changes to the order of nucleotides in a segment of DNA that codes for a protein. a.…

A: Nucleotide is the basic building block of nucleic acids. RNA and DNA are long chains of nucleotides.…

Q: Cell differentiation always involves(A) transcription of the myoD gene.(B) the movement of cells.(C)…

A: The cell is the basic structural, functional, and biological unit of all known organisms. A cell is…

Q: These genes are involved in normal cell growth and division, but if mutated, could become more…

A: Oncogenes are tumour-causing genes. They are mutated and abnormal that leading to uncontrolled cell…

Q: The marking process for genomic imprinting initially occursduringa. gametogenesis. c. embryonic…

A: Genomic imprinting basically refers to the phenomenon of gene expression in a…

Q: Early pregnancy tests used antibodies to detect the presence of human chorionic gonadotropin (hCG)…

A: The outermost membrane that surrounds the embryo is known as chorion. From the outer fold of the…

Q: Why does a mouse embryo develop faster than a human embryo, for example?

A: The similarities between humans and mice permit the study of the development of humans and their…

Q: Somatic gene therapy_______.a) affects spermb) affects eggc) affects progenyd) affects body cell

A: Gene therapy is a novel technique that is used to correct the defective genes. In this technique, it…

Q: In mice, the copy of the Igf2 gene that is inherited from the mother isnever expressed in her…

A: The unit of heredity is a gene. These genes account for different phenotypic and genotypic…

Q: The FOXP gene strongly affects what else, in addition to brain development? A. The stomach and…

A: Forkhead box protein P2 (FOXP or FOXP2) is a protein that is encoded by the FOXP2 gene in humans.…

Q: _____ is the transmission of DNA to offspring.     a. Differentiation   b. Inheritance   c.…

A: In genetics, the genetic material is located in the nucleus, cytoplasm, and mitochondria of the cell…

Q: Question 3 is the transmission of DNA to offspring. O a Development O b. Homeostasis O c.…

A: DNA It is defined as the molecule which constitutes two polynucleotide chains that form a double…

Q: During development, cells become a. differentiated before they become determined. b. determined…

A: The biological cell is the fundamental unit of life. It is a hub of metabolic activities. Numerous…

Q: Extranuclear inheritance occurs becausea. certain genes are found on the X chromosome.b. chromosomes…

A: Extranuclear inheritance involves the genetic information located in the organelles. It is a…

Q: ------ is the transmission of DNA to offspring. a. Reproduction b.Development c. Homeostasis d.…

A: Introduction: The environment is composed of a variety of organisms. These organisms grow and mature…

Q: Mutations to proto-oncogenes act toa. increase cell division. c. repress oncogenes.b. increase DNA…

A: Cancer-critical genes are categorized into classes; Proto-oncogenes and Tumor-suppressor genes. The…

Q: 1. Refers to the phase which it ensure that important cell-cycle events occur in the correct…

A: Cell cycle is a process occurring in the cells for them to divide, grow and replicate. The two…

Q: A carcinogenic compound is placed on the skin of inbred laboratory mice. In many of these mice, skin…

A: A carcinogenic substance is any substance or particle that induces the cancer formation in the host…

Q: Morphogenesis occurs through the multistep process of (a) differentiation (b) determination (c)…

A: Many processes are involved in shaping the microorganism and its structures where it performs the…

Q: Which of the following is inheritable?a) An altered gene in spermb) An altered gene in testesc) An…

A: Genetic inheritance is a scientific phenomenon that describes how the characteristics of the parents…

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: Excess exposure to the sun can lead to skin cancer due to mutations in the DNA of your skin cells.…

A: Answer.  When a normal dividing cell lost its control over its division, differentiation and…

Q: Blood islands first form in the embryonic:- a. spleen. d. liver. b. yolk sac. e. red bone marrow. c.…

A: Blood Islands are structures that form around the developing embryo and which give rise to the…

Q: a.Metaphase II

A: If there is no fertilisation , oocyte will arrested at metaphase 2 of meosis 2 .       Answer a is…

Q: Which of the following type of placenta is found in humans? a) Discoidal b) Zonary c) Diffuse d)…

A: Introduction - During the pregnancy phase, the placenta is an organ that grows inside the uterus. A…

Q: Why is it easier to manipulate embryonic stem cells to differentiate into various tissues than it is…

A: Embryonic stem cells are pluripotent  stem cells, meaning they can divide into more stem cells or…

Q: The cloning experiments carried out on frogs demonstrated that (a) all differentiated frog cells are…

A: Cloning is an established methods in which various types of materials are used to produce several…

Q: The first three center around extranuclear inheritance involving DNA in organelles. The fourth…

A: Extranuclear inheritance is also termed cytoplasmic inheritance. It occurs in cytoplasmic organelles…

Q: A mutated gene that transforms a normal cell into a tumor cell is called a O a. neoplasm. O b.…

A: When cells expand and divide faster than they should or do not die when they should, an irregular…

Q: In organisms such as the chick, in which the egg has extensive yolk, the eggA. shows complete…

A: In organisms such as the chick, in which the egg has extensive yolk. Therefore the eggs of chick are…

Q: Cells become what throught the process of differentiation

A: Cell Differentiation is a process in which a cell undergoes changes from new specialized cell in…

Q: How do you make a three-parent baby? OA. Replace intended Mom's nucleus with a donor's nucleus. B.…

A: The sperm cell swims up to the egg and fertilizes it, leading to the formation of a zygote. This…

Q: Hox genes encode transcription factors that a. control segmentation. b. promote determination. c.…

A: Arthropods are the invertebrate animals characterized by a distinct segmented body and paired…

Q: If you observed fruit flies with the following developmental abnormalities, would you guess that a…

A: Step 1 Homeotic genes are the master regulators genes that control the development of a particular…

Q: Which of the following does NOT happen in the germinal period? a. dividing mass of cells travels to…

A: During the nine months of a female's pregnancy, an infant goes through a lot of changes. An infant's…

Q: Stargardt's disease was one of these that can be treated using embryonic stem cells.  Why would…

A: Stem cells are known as the raw materials of the body from which other cells with specialized…

Q: Which of these are cellular activities that sustain a single-celled organism through its lifetime?…

A: Single-celled organisms are those whose body consists of a single cell. They can be grouped into…

Q: As we are growing and developi as embryos, the cells that eventu become the liver or brain or…

A: Embryogenesis is a process of formation and development of a embryo. The process starts with…

Q: An egg cell originally comes from an unspecialized diploid cell called a(an)… Group of answer…

A: The process of formation of egg cell(ovum) is called as oogenesis. The process of oogenesis occurs…

Q: The expression of maternal-effect genes directly leads to a. the establishment of body axes. b.…

A: Maternal effect genes are the genes whose products are present in the fertilized egg or embryo…

Q: With regard to cancer cells, which of the following statementsare true?A. Cancer cells are clonal,…

A: Cancer is a group of diseases involving abnormal growth of cells, which tend to proliferate in an…