Answer the following statements true (T) or false (F)
1. Barr bodies are a diagnostic feature of X inactivation.
2. A human cell with a Barr body always comes from a female.
3. Genomic imprinting can result in offspring with identical genotypes that have different phenotypes.
4. The DNA methylation state of a zygote will be maintained throughout the life of the organism and then passed on unchanged to its offspring.
1. TRUE
2. FALSE
3. TRUE
4. FALSE
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Which of the following animals has a heart with two chambers: one atrium and one ventricle?
a. bird b. mammal c. frog d. fish
Which of the following best describes a dead cell as a system?
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