Zygote - Study guides, Class notes & Summaries

produce progesterone and bhCG in very early pregnancy. These cells develop into the chorionic villi of the placenta - Trophoblastic cells Which of the following ovarian tumors contains both epithelial and stromal components? A: serous cystadenoma B: thecoma C: cystadenofibroma D: mucinous cystadenoma - C in a first trimester fetus this is defined as a single ventricle, fused thalami, with an absent corpus collosum. - Alobar holoprosencephaly portion of the peritoneum connecting anterio...

Prenatal Developmental Exam Study Guide with Complete Solutions germinal period - Correct Answer the period of prenatal development that takes place in the first 2 weeks after conception The span between conception and birth usually lasts 38 to______weeks. - Correct Answer 40 Prenatal development is divided into what three periods? - Correct Answer fetal germinal embryonic The fertilized egg is called the ______. - Correct Answer zygote In the germinal period, the zygote undergoe...

Test Bank for Genetics A Conceptual Approach, 7th Edition Benjamin Pierce Test Bank for Chapter 2: Chromosomes and Cellular Reproduction Multiple-Choice Questions 1. Which of the following statements is false? a. Errors in chromosome separation are rarely a problem for an organism. b. Errors in chromosome separation can result in a miscarriage. c. Errors in chromosome separation can result in cancer. d. Errors in chromosome separation can result in a child with severe handicaps. e. Erro...

Bio 172 Exam 1 Questions and Answers Already Passed **Describe the events in a sexual cycle and explain its significance.** **Events:** - Formation of haploid gametes (1n). - Fertilization (syngamy) of gametes. - Formation of a diploid zygote (2n). - Recombination occurs during gamete formation. **Significance:** The sexual cycle leads to genetic variation through recombination, ensuring species adaptability and survival. **Identify the first supergroup.** **First Supergro...

Chapter 54—Prenatal Care MULTIPLE CHOICE 1. Which of these statements regarding prenatal risk factors is TRUE? a. Fathers who smoke can contribute to decreased birth weight in their infants. b. Fetal alcohol syndrome is associated with excessive intake of alcohol during the second trimester of pregnancy. c. Illicit drug use is responsible for a majority of spontaneous abortions and stillbirths. d. Mothers who are not immune to rubella should be immunized during the first trimester o pr...

BIO 172 UH Manoa Exam 2 Questions and Answers 100% Pass **What are animals characterized by?** **Animals:** Multicellular eukaryotes that are heterotrophic, lacking cell walls, and having bodies held together by structural proteins like collagen. **What is the function of collagen in animals?** **Collagen:** It makes up connective tissues, providing flexibility, high tensile strength, and elasticity. **Differentiate between skin, ligament, and tendon based on collagen arrangeme...

New individuals are created when ___________________________ a. Gametes combine b. Genes combine c. Meiosis occurs d. Mitosis occurs - ANSWER A. Gametes Combine When sperm and ovum unite at conception, the resulting cell is called a: a. Gamete b. Gene c. Zygote d. Blastocyst - ANSWER C. Zygote Monozygotic - compared to dizygotic - twins develop when: a. Two ova are released from the mother's ovaries b. Two sperm fertilize the same egg c. A zygote separates into two clusters o...

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....

ANSC 3040 Final Questions With Complete Solution 2024 What characterizes an Ootid to go to a Zygote and what is this process called Correct Answer: fusion of the two nuclei to one. called Syngamy What characterizes the change from a Zygote to a 2 cell embryo Correct Answer: the one cell embryo will undergo cleavage and become a 2 cell What are 7 stages of early embryonic development Correct Answer: 1. Ootid 2. Zygote 3. 2-cell embryo 4. Morula 5. Early blastocyst 6. Hatching Blast...

karyotyping - number and type of chromosome present Barr body - -condensed inactive X chromosome near nucleus of cell -all females have 1 Barr body nondisjunction - failure of chromosomes to separate during meiosis autosomal nondisjunction - -failure of chromosomes (other than sex chromosomes) to separate during meiosis -exs: trisomy 21, trisomy 18 translocation - portion of one chromosome is transferred to another (usually nonhomologous) abnormal egg (XX) x normal sperm (X) - -zygote: X...