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 (C)</p> Signup and view all the answers

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

<p>Cleavage (A)</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 (C)</p> Signup and view all the answers

What are the cells produced by cleavage called?

<p>Blastomere (A)</p> Signup and view all the answers

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

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

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

<p>Foramen ovale (B)</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 (A)</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 (A)</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 (C)</p> Signup and view all the answers

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

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

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

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

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

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

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

<p>Trophoblast (D)</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 (C)</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 (C)</p> Signup and view all the answers

When does implantation of the blastocyst occur?

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

Which example demonstrates incomplete dominance?

<p>Sickle-cell disease (B)</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 (C)</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 (A)</p> Signup and view all the answers

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

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

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

<p>XX (C)</p> Signup and view all the answers

What determines an individual's gender at fertilization?

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

What are traits inherited through the sex chromosomes called?

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

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