GK
BASIC GENERAL KNOWLEDGE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Theca
|
|
|
Zona pellucida
|
|
|
Jelly layer
|
|
|
Jelly envelop
|
Detailed explanation-1: -Complete answer: Zona pellucida protects the egg when it releases from the ovary. It is a translucent covering of glycoproteins that is surrounded by the mammalian egg. This membrane is required for the binding of spermatozoa which allows species-specific fertilization to prevent polyspermy.
Detailed explanation-2: -The zona pellucida supports communication between oocytes and follicle cells during oogenesis; protects oocytes, eggs, and embryos during development, and regulates interactions between ovulated eggs and free-swimming sperm during and following fertilization.
Detailed explanation-3: -A zona pellucida (ZP)2 surrounds mammalian oocytes, ovulated eggs, and embryos up to the early blastocyst stage of development. The ZP appears during oocyte growth, and blastocyst stage embryos hatch from the ZP prior to implanting in the uterus.