Embryonic Development Quiz
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Questions and Answers

During which period of development is the developing human called an embryo?

  • First two months (correct)
  • Gestation period
  • After the eighth week
  • Fetal period

    • What is the name of the period of time from the eighth week until birth?

  • Embryonic period
  • Fetal period (correct)
  • Gestation period
  • First two months

    • When does fertilization usually occur in the uterine (Fallopian) tube?

  • During the last week of pregnancy
  • During the first week of pregnancy
  • At the time of birth
  • Within 12 to 24 hours after ovulation (correct)

    • What is the term used to describe the functional changes that sperm undergo in the female reproductive tract?

    <p>Capacitation</p> Signup and view all the answers

    What is the term for the early rapid mitotic cell division of a zygote?

    <p>Cleavage</p> Signup and view all the answers

    What is the name of the structure formed by the fusion of a sperm with a secondary oocyte?

    <p>Fertilized ovum</p> Signup and view all the answers

    What are the cells produced by cleavage called?

    <p>Blastomere</p> Signup and view all the answers

    During the fetal period, which of the following does NOT occur?

    <p>Development of functional lungs</p> Signup and view all the answers

    Which structure in fetal circulation becomes the fossa ovalis after birth?

    <p>Foramen ovale</p> Signup and view all the answers

    Which hormone is responsible for maintaining the uterine lining and preparing the mammary glands for milk secretion during the first 3 to 4 months of pregnancy?

    <p>Progesterone</p> Signup and view all the answers

    Which hormone mimics LH and stimulates the corpus luteum to continue producing estrogens and progesterone during pregnancy?

    <p>Human chorionic gonadotropin</p> Signup and view all the answers

    Which hormone is produced by the chorion of the placenta and helps prepare the mother's body for childbirth?

    <p>Corticotropin-releasing hormone</p> Signup and view all the answers

    What are some of the pregnancy-induced physiological changes mentioned in the text?

    <p>Increased appetite</p> Signup and view all the answers

    What is the process by which the fetus is expelled from the uterus through the vagina?

    <p>Expulsion of the fetus</p> Signup and view all the answers

    Which of the following is the correct sequence of events during embryonic development?

    <p>Implantation, gastrulation, formation of embryonic membranes</p> Signup and view all the answers

    Which structure provides an early site of blood formation during embryonic development?

    <p>Yolk sac</p> Signup and view all the answers

    What is the function of the amniotic fluid during fetal development?

    <p>All of the above</p> Signup and view all the answers

    Which layer of the blastocyst becomes part of the chorion during embryonic development?

    <p>Trophoblast</p> Signup and view all the answers

    What is the main function of the placenta during pregnancy?

    <p>Exchange of oxygen and nutrients between mother and fetus</p> Signup and view all the answers

    Which of the following is true about the umbilical cord?

    <p>It carries deoxygenated blood from the placenta to the fetus</p> Signup and view all the answers

    When does implantation of the blastocyst occur?

    <p>7 to 8 days after fertilization</p> Signup and view all the answers

    Which term describes the phenomenon where most genes give rise to the same phenotype whether they are inherited from the mother or father?

    <p>Genomic imprinting</p> Signup and view all the answers

    In incomplete dominance, how does the phenotypic expression of a particular gene appear in the heterozygote?

    <p>Intermediate</p> Signup and view all the answers

    Which example demonstrates incomplete dominance?

    <p>Sickle-cell disease</p> Signup and view all the answers

    What is the term used for genes that have more than two alternate forms?

    <p>Multiple-allele inheritance</p> Signup and view all the answers

    Which term describes the inheritance of a trait that is controlled by the combined effects of many genes?

    <p>Polygenic inheritance</p> Signup and view all the answers

    Which chromosomes are responsible for determining an individual's gender?

    <p>Sex chromosomes</p> Signup and view all the answers

    In females, what is the composition of the 23rd pair of chromosomes?

    <p>XX</p> Signup and view all the answers

    What determines an individual's gender at fertilization?

    <p>Presence or absence of an SRY gene</p> Signup and view all the answers

    What are traits inherited through the sex chromosomes called?

    <p>Sex-linked or X-linked traits</p> Signup and view all the answers

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