Exam 19: Cellular Mechanisms of Development

A mutation in a Hox gene typically results in

Cells that die of injury usually swell and then burst.Their contents are released into the extracellular fluid.This form of cell death is referred to as

Which proteins are encoded by genes that code for the first mRNAs transcribed in Drosophila embryos?

A zygote initially divides into smaller cells, each called a

A fly embryo that expresses the bicoid mutant phenotype

A muscle precursor cell expressing the MyoD1 gene would be considered to be

The term neoplasia refers to cell accumulation.Neoplasia can be caused by

Scientists attempted for many years to conduct nuclear transplants but failed.However, geneticists had success in cloning a sheep.They were successful because they

If a Drosophila mother is mutant for dorsal, her embryos would

There are cases, particularly in fruit flies, in which a normal body part grows in the wrong spot.For instance, legs on the head growing instead of antennae, or a second set of wings behind the normal pair.What can explain this?

The main difference between therapeutic cloning and reproductive cloning is that

What can be said about animal and vegetal poles?

Drosophila eggs acquire an initial asymmetry before fertilization as a result of

During this initial period of division in a zygote, there is no increase in the overall size of the embryo.

A fertilized egg is called a

The Drosophila homeotic genes typically contain the homeobox.The homeobox is a sequence of 180 nucleotides.The number of amino acids coded for by this sequence is

Plants do not utilize the process of cell migration in their development.Instead plants utilize

If one were to inject cytoplasm containing Bicoid into the middle of a Drosophila egg immediately prior to fertilization, the embryo would

Describe the apoptotic pathway in mammalian cells.

In general, the blastomeres of this region form the endodermal tissues.