Ch. 25 - Human Sexual Reproduction and DevelopmentSee all chapters
All Chapters
Ch. 1 - Introduction to Physiology
Ch. 2 - Molecules and Molecular Interactions
Ch. 3 - Cells and Tissues
Ch. 4 - Cell Metabolism: Bioenergetics, Enzymes, and Respiration
Ch. 5 - Membrane Dynamics
Ch. 6 - Cell Communication
Ch. 7 - Integumentary System
Ch. 8 - Bone and Cartilage
Ch. 9 - Skeletal System
Ch. 10 - Joints
Ch. 11 - Muscles
Ch. 12 - The Nervous System I: Neurons and Neuronal Networks
Ch. 13 - The Nervous System II: The Central Nervous System
Ch. 14 - The Autonomic Nervous System
Ch. 15 - Sensory Physiology
Ch. 16 - The Endocrine System
Ch. 17 - Cardiovascular Physiology I: The Heart
Ch. 18 - Cardiovascular Physiology II: Blood, Blood Vessels, Circulation, and Exchange
Ch. 19 - The Urinary System
Ch. 20 - Respiratory Physiology
Ch. 21 - Acid-Base Balance-- Controlling Blood pH
Ch. 22 - Introduction to the Immune System
Ch. 23 The Lymphatic System
Ch. 23 - The Digestive System
Ch. 24 - Regulation of Metabolism and Energy Balance
Ch. 25 - Human Sexual Reproduction and Development

Concept #1: Review of the Sex Chromosomes

Concept #2: Early Development and the Bipotential Genitals

Concept #3: Feminization-- Becoming a Girl

Concept #4: Masculinization-- Becoming a Boy

Practice: A reproductive biologist is working at a start-up company that wants to let aspiring parents choose the sex of their child. This process will involve picking one sperm and one egg, doing in vitro (“in a dish”) fertilization, and then implanting the zygote in the mother-to-be. Which of the following gametes most directly determines the sex of the child and should be the focus of the biologist’s efforts?

Practice: Turner Syndrome is an abnormality of the sex chromosomes where the patient has only one X chromosome and no 46th chromosome at all (i.e. they are “XO”). Which of the following describes the sex phenotype of a patient with Turner Syndrome (i.e. how are they likely to outwardly appear)?

Practice: Klinefelter Syndrome is an abnormality of the sex chromosomes where the patient has two copies of the X chromosomes and one copy of the Y chromosome (i.e. they are “XXY” and have 47 chromosomes total). Which of the following describes the sex phenotype of a patient with Klinefelter Syndrome (i.e. how are they likely to outwardly appear)?

Practice: A one-day old infant with two X chromosomes is found to have a blind vaginal pouch—that is, they have a normal-appearing external vagina that ends abruptly and lacks a normal vaginal canal. She does not have a uterus, Fallopian tubes, or ovaries. Which of the following structures failed to develop to cause this abnormality?

Practice: Androgen Insensitivity is a sexual development disorder where an XY person makes testosterone but cannot respond to it. They can still respond to anti-mullerian hormone. What would an androgen insensitive baby’s genitals look like? (This is a really hard one—watch the video.)