10 Questions
What is the primary function of the SRY gene?
Initiating the transcription of genes necessary for testicular differentiation
Which hormone is secreted by the ovaries during pregnancy to facilitate delivery?
Relaxin
What determines the sex of an individual in humans?
The combination of X and Y chromosomes
Which hormone is secreted by both the ovaries and adrenal cortex in both sexes?
Androgen
Which statement best describes the primary factors responsible for the differences between males and females in most mammalian species?
The differences depend primarily on a single chromosome (the Y chromosome) and a single pair of endocrine structures (testes in males and ovaries in females).
What is the primary function of inhibin B?
Inhibiting the secretion of follicle-stimulating hormone (FSH)
What determines the differentiation of the primitive gonads into testes or ovaries in utero in humans?
It is genetically determined.
What is responsible for male sexual behavior and, in some species, the male pattern of gonadotropin secretion?
The action of male hormones on the brain in early development.
What causes the appearance of features typical of the adult male or female and the onset of the sexual cycle in the female after birth?
Hormones secreted by the gonads at adolescence, activated by gonadotropins from the anterior pituitary.
What happens to gonadal function in human females and males as they age?
In females, ovarian function remains unchanged with advancing age. In males, gonadal function slowly declines with advancing age, but the ability to produce viable gametes persists.
Explore the genetic and endocrine factors that lead to the differentiation of male and female sexes in mammals. Learn about the role of the Y chromosome, testes, and ovaries in determining sex characteristics.
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