10 Questions
How can the consumer assess the freshness of an egg using a bowl of salt water?
The egg stands up in the water with the rounded end upwards.
What is the result of candling a fresh egg?
The yolk is dimly visible and does not move much.
What happens when cracking a fresh egg?
There is no thick white and the yolk is flat and firm.
What hormone presumably plays a major role in the muscle contractions and oviposition?
Oxytocin
Which external factor influences the ovulation and laying of eggs in wild birds in a particular climate zone?
Length of the day
How does the egg usually rotate before being pushed through the uterus to the vagina?
180° around its width axis
What is the role of ultraviolet light in egg laying for certain bird species?
It has no effect on egg laying
When does the ovulation of a new egg cell typically occur after an egg has been laid?
30 minutes after the egg is laid
How do poor layers typically compare to good layers in terms of laying series?
Good layers have laying series of 1 or 2 eggs, whereas poor layers have series of 4 up to 200 eggs
What happens when an egg is ultimately laid late in the light phase?
The next egg cell ovulates 16 to 18 hours later
Test your knowledge on assessing egg quality based on size, freshness, and the candling technique. Learn about how consumers perceive egg quality and how the egg trade assesses freshness.
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