It is inherited in an autosomal recessive manner and is caused by a mutation in the HBB gene. The mutation that causes hemoglobin E disease primarily occurs in Southeast Asian populations, and rarely in Chinese populations. Most people with HbE disease do not need any treatment.
CHAPTER 27 Homework Review ï· The ability of sperm cells to move along the ductus deferens is due to ________. peristaltic contractions ï· Prostate cancer is _______.sometimes a slow-growing cancer that may never represent a threat to the patient ï· Erection of the penis results from ________.a parasympathetic reflex ï· Why doesn't semen enter the ...
Vas deferens. vas deferens. The excretory duct of the testis that conveys sperm. A duct that carries spermatozoa from the epididymis to the ejaculatory duct.A type of duct that conveys sperm from the testis to the tip of the penis and thus the external environment, in one way or another.The Vas Deferens and its' source and destination depends on the species at hand. duct that carries spermatozoa from the epididymis to the ejaculatory duct.A type of duct that conveys sperm from the testis to the tip of the penis and thus the external environment, in one way or another.