As many of you know, yesterday was Thanksgiving Day! Millions of American families sat down at the table yesterday evening and feasted upon the turkey and many many other dishes. It seems as if all the turkeys in America are fed well year round, preparing them for this one day special occasion. Being that in class we studied the development of chick eggs, I wondered if the development of turkey eggs would be the same? I mean it would make sense that most of the development of turkey eggs would be similar to that of chicken eggs. After-all, they both develop into birds...right?
Cleavage in chick eggs occurs through discoidal cleavage. Discoidal cleavage is a type of meroblastic cleavage that happens when a disk of cells are produced at the animal pole of the zygote. Cleavage only occurs in the blastodisc. Cleavage in the turkey egg is asynchronous and asymmetrical unlike the chick embryo.
Have you ever thought about why we only chick eggs and not turkey eggs? The reason is because it takes a turkey a longer time to to lay the egg and it takes a longer time to hatch. Therefore chicken eggs are widely used, because they lay eggs at a faster rate and they take a shorter amount of time to hatch.
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