Developmental biologists did the following experiments to discover the role of endoderm in the specification of cardiogenic mesoderm.
Using early mouse embryos:
Experiment 1: Removed the anterior endoderm and cultured the embryo â no cardiogenic mesoderm and no heart muscle cells developed.
Experiment 2: Removed anterior endoderm and replaced it posterior endoderm from another embryo and cultured the embryo â no cardiogenic mesoderm and no heart muscle cells formed.
Experiment 3: Removed anterior endoderm and replaced it anterior endoderm from another embryo and cultured the embryo â cardiogenic mesoderm and heart muscle cells developed.
Interpret these data. What are the signals that come from the anterior endoderm? What is their role in specification of the cardiogenic mesoderm?
Developmental biologists did the following experiments to discover the role of endoderm in the specification of cardiogenic mesoderm.
Using early mouse embryos:
Experiment 1: Removed the anterior endoderm and cultured the embryo â no cardiogenic mesoderm and no heart muscle cells developed.
Experiment 2: Removed anterior endoderm and replaced it posterior endoderm from another embryo and cultured the embryo â no cardiogenic mesoderm and no heart muscle cells formed.
Experiment 3: Removed anterior endoderm and replaced it anterior endoderm from another embryo and cultured the embryo â cardiogenic mesoderm and heart muscle cells developed.
Interpret these data. What are the signals that come from the anterior endoderm? What is their role in specification of the cardiogenic mesoderm?
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· allelic heterogeneity | |||||||||||||||||||||||||||||||||||||||||||||||
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· recessive traits | ||
· allelic heterogeneity | ||
· locus heterogeneity | ||
· vampirism |
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Answer
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· penetrance | ||
· expressivity | ||
· allelic heterogeneity | ||
· locus heterogeneity |
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· True
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