Exam 19: Cellular Mechanisms of Development

Very early in development,each cell is capable of expressing all its genes.This is referred to as

In C.elegans ced-9/ced-3 double mutants

The main difference between therapeutic cloning and reproductive cloning is that

What are the characteristics of stem cells? (Select all that apply)

In insects,the passage from one body form to another is called

The finding that homeotic genes are present in both mammals and insects indicates that these genes must

Plants have special groups of self-renewing cells called

Egg cells were combined with this cell type to form the cloned sheep named Dolly.

In Drosophila,the cells created by cleavage contain different developmental signals from the egg called cytoplasmic

A zygote initially divides into smaller cells,each called a(n)

A fly embryo that expresses the bicoid mutant phenotype

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

A mutation in a Hox gene typically results in

Novel phenotypic adaptations can arise as a result of changes only in how organisms develop.

In contrast to the cell cycle of adult somatic cells,the dividing cells of an early embryo lack which cell cycle stage(s)?

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

If cells from a wing are transplanted to the leg prior to their determination,into what will they likely develop?

________ are cell adhesion proteins that some cells use in the process of differentiation during development.

Heterochrony is a change in development based on