testis
Noun
Meaning
A testicle.
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All these observations lead to a consensus that a dominant gene that determines testis development ( TDF ) must exist on the human Y chromosome.
An individual that produces both types of gametes is called hermaphrodite (a name applicable also to people with one testis and one ovary).
The human testis secretes high levels of testosterone from about week 8 of fetal life until 5–6 months after birth (a similar perinatal surge in testosterone is observed in many species), a process that appears to underlie the male phenotype.
The caecum, a long, white organ, is found next to the ovary or testis.
He adds, “Here, organs were collected from developing mice soon after the gonad began to take on characteristics specific to a testis or ovary.”
Males do not possess these organs, but instead have a large testis in place of the ovary, and a spermatophoric gland and sac.