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Question
The solid ball of cells formed from cleavage is called
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Solution
The correct option is A Morula
A morula is an early-stage embryo consisting of 16 cells (called blastomeres) in a solid ball contained within the zona pellucida. The morula is produced by a series of cleavage divisions of the early embryo, starting with the single-celled zygote. A morula is distinct from a blastocyst in that a morula (3–4 days after fertilization) is a 16-cell mass in a spherical shape whereas a blastocyst (4–5 days after fertilization) has a cavity inside the zona pellucida along with an inner cell mass. A morula, if untouched and allowed to remain implanted, will eventually develop into a blastocyst. So the correct option is 'morula'.
A morula is an early-stage embryo consisting of 16 cells (called blastomeres) in a solid ball contained within the zona pellucida. The morula is produced by a series of cleavage divisions of the early embryo, starting with the single-celled zygote. A morula is distinct from a blastocyst in that a morula (3–4 days after fertilization) is a 16-cell mass in a spherical shape whereas a blastocyst (4–5 days after fertilization) has a cavity inside the zona pellucida along with an inner cell mass. A morula, if untouched and allowed to remain implanted, will eventually develop into a blastocyst.
So the correct option is 'morula'.
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