30 Questions
During which period of development is the developing human called an embryo?
First two months
What is the name of the period of time from the eighth week until birth?
Fetal period
When does fertilization usually occur in the uterine (Fallopian) tube?
Within 12 to 24 hours after ovulation
What is the term used to describe the functional changes that sperm undergo in the female reproductive tract?
Capacitation
What is the term for the early rapid mitotic cell division of a zygote?
Cleavage
What is the name of the structure formed by the fusion of a sperm with a secondary oocyte?
Fertilized ovum
What are the cells produced by cleavage called?
Blastomere
During the fetal period, which of the following does NOT occur?
Development of functional lungs
Which structure in fetal circulation becomes the fossa ovalis after birth?
Foramen ovale
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?
Progesterone
Which hormone mimics LH and stimulates the corpus luteum to continue producing estrogens and progesterone during pregnancy?
Human chorionic gonadotropin
Which hormone is produced by the chorion of the placenta and helps prepare the mother's body for childbirth?
Corticotropin-releasing hormone
What are some of the pregnancy-induced physiological changes mentioned in the text?
Increased appetite
What is the process by which the fetus is expelled from the uterus through the vagina?
Expulsion of the fetus
Which of the following is the correct sequence of events during embryonic development?
Implantation, gastrulation, formation of embryonic membranes
Which structure provides an early site of blood formation during embryonic development?
Yolk sac
What is the function of the amniotic fluid during fetal development?
All of the above
Which layer of the blastocyst becomes part of the chorion during embryonic development?
Trophoblast
What is the main function of the placenta during pregnancy?
Exchange of oxygen and nutrients between mother and fetus
Which of the following is true about the umbilical cord?
It carries deoxygenated blood from the placenta to the fetus
When does implantation of the blastocyst occur?
7 to 8 days after fertilization
Which term describes the phenomenon where most genes give rise to the same phenotype whether they are inherited from the mother or father?
Genomic imprinting
In incomplete dominance, how does the phenotypic expression of a particular gene appear in the heterozygote?
Intermediate
Which example demonstrates incomplete dominance?
Sickle-cell disease
What is the term used for genes that have more than two alternate forms?
Multiple-allele inheritance
Which term describes the inheritance of a trait that is controlled by the combined effects of many genes?
Polygenic inheritance
Which chromosomes are responsible for determining an individual's gender?
Sex chromosomes
In females, what is the composition of the 23rd pair of chromosomes?
XX
What determines an individual's gender at fertilization?
Presence or absence of an SRY gene
What are traits inherited through the sex chromosomes called?
Sex-linked or X-linked traits
Test your knowledge on the development of major systems in human embryos and fetuses. Learn about neurulation, organogenesis, and the differentiation of reproductive systems through this informative quiz.
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