Primordial germ cells - Samenvattingen, Aantekeningen en Examens

Moore: The Developing Human, 9th Edition Chapter 01: Gametogenesis and Fertilization Test Bank MULTIPLE CHOICE Directions: Each group of questions below consists of a numbered list of descriptive words or phrases accompanied by a diagram with certain parts indicated by letters or by a list of lettered headings. For each numbered word or phrase, select the lettered part or heading that matches it correctly and then insert the letter in the space to the right of the appropriate number....

Craniofacial Biology-Embryology Exam with Questions and Answers Timeline of human development ANSWER Embryonic period (first 8 weeks) + Fetal period (everything afterwards) First trimester = 1 - 12 week Second trimester = 12 - 25 week Third trimester = 25 - 38 week Fertilization ANSWER The fusion of haploid gametes (oocyte + sperm) to result in formation of diploid embryo --> gametes function to transmit genetic info --> gametes derived from primordial germ cells Fertili...

Medical Embryology Exam Questions With 100% Correct Answers Embryology - answer- Comes from the Greek word embryon which means the unborn - Studies prenatal development of gametes, fertilization and development of embryos and fetuses - The study of animal development from the phase of an organism between fertilization and birth Embryology wans to answer two fundamental questions - answer1. How does the fertilized egg give rise to the adult body 2. How does the adult body produce another b...

Medical Embryology Exam Questions With 100% Correct Answers Embryology - answer- Comes from the Greek word embryon which means the unborn - Studies prenatal development of gametes, fertilization and development of embryos and fetuses - The study of animal development from the phase of an organism between fertilization and birth Embryology wans to answer two fundamental questions - answer1. How does the fertilized egg give rise to the adult body 2. How does the adult body produce another b...

Medical Embryology Exam Questions With 100% Correct Answers Embryology - answer- Comes from the Greek word embryon which means the unborn - Studies prenatal development of gametes, fertilization and development of embryos and fetuses - The study of animal development from the phase of an organism between fertilization and birth Embryology wans to answer two fundamental questions - answer1. How does the fertilized egg give rise to the adult body 2. How does the adult body produce another b...

Steps of embryonic development Correct Answer-1) Zygote (fertilized egg) undergoes early cleavages -> morula (group of equivalent, undistinguishable cells) 2) As morula grows, cell acquires specific characteristics & some morphological differences (ex. embryonic axes) -> blastula (characterized by presence of hollow cavity, blastocele) 3) Gastrulation (gastrula) originates 3 definitive germ layers (ectoderm, mesoderm, endoderm) 4) Once scaffold & primordial for tissues & organs laid out...

Cleavage produces daughter cells called Question options: trophoblasts blastomeres blastocysts morulae correct answers blastomeres Which germ layer gives rise to the epidermis (epithelial layer) of the skin? Question options: neural crest ectoderm endoderm mesoderm correct answers ectoderm XY individuals with complete androgen insensitivity would have the following characteristics: Question options: lack testes, have female internal and external genitalia have testes, lack bot...

Craniofacial Biology Test with Questions and Answers Gametes are derived from ANSWER Primordial germ cells Primary function of gametes is to ANSWER Transmit genetic information Primordial germ cells are formed during ANSWER The 2nd week Primordial germ cells arise from the ANSWER Epiblast Primordial germ cells move to where and when? ANSWER PGCs move to the wall of the yolk sac during the 3rd week During the 4th week, PGCs migrate where ANSWER From the yolk sac to the genital r...

The Pre-embryonic period - Consists of the first two weeks in the forms: - Zygote (1 cell; diploid) - Morula (72 hours) - Blastocyst (5 days) Morula - At 72 hours of gestation - solid ball of 16-32 cells (called blastomeres) - the size of an ovum/zygote due to in favor of rapid cleavage division (for optimal surface area and waste removal) over growth. Blastocyst - 5 Days Gestation Features: - fluid filled cavity (blastocoel or blastocyst cavity) - inner cell mass (becomes the embryo)...

Developmental Biology Exam 1 Name________________ This exam is a “take home exam,” and you may use any materials you wish. You may study with your peers, but you are not allowed to work with any other individual on the specific questions of these exams. Your submitted response must be your own original work. Solicitation from the Emergency International Science Fund: “The germ cell origin of life to save the rain forest (and us).” The recent increase in deforestation of the Amazon...