Embryonic Development from Zygote to Blastula
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Questions and Answers

The inner cell mass is also known as the trophoblast.

False

The genetic engineering of a human child, the production of "designer babies" with desirable phenotypic characteristics, was once a topic restricted to science fiction.

False

Eugenics is the use of information and technology from a variety of sources to improve the genetic makeup of the human race.

True

The goal of creating genetically superior humans was not prevalent in several countries during the early 20th century.

<p>False</p> Signup and view all the answers

Prenatal genetic diagnosis (PGD) has not been developed in more recent times.

<p>False</p> Signup and view all the answers

Cleavage is a process where the zygote undergoes multiple rounds of cell division to form the blastula.

<p>True</p> Signup and view all the answers

The blastula is a solid mass of cells without any internal cavity.

<p>False</p> Signup and view all the answers

In placental mammals, including humans, the eggs undergo meroblastic cleavage due to the presence of a large amount of yolk.

<p>False</p> Signup and view all the answers

The blastocyst is a structure formed during the blastula stage in mammals, characterized by an inner cell mass distinct from the surrounding blastula.

<p>True</p> Signup and view all the answers

During cleavage, the total mass of the cells increases as the zygote divides into multiple smaller cells.

<p>False</p> Signup and view all the answers

In the blastocyst stage of mammalian development, the cells arrange themselves into two layers: the inner cell mass and the trophoblast.

<p>True</p> Signup and view all the answers

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