3 parts of digestive tract in mucosa layer which contains cells that produce digestive enzymes
What will be an ideal response?
stomach, small intestine, mouth
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A biotech startup is developing a process that would allow clients the opportunity to clone their deceased dogs from a small tissue sample. The nuclei from deceased pets are confirmed to be intact and viable before and after they are excised and inserted into egg cells harvested from a donor dog. The egg cell’s own nucleus is carefully removed before the new nucleus is inserted and tested for damage that might cause the egg’s DNA to leak into the cell’s cytoplasm. After the nuclear transplant occurs, the egg cell is chemically stimulated to begin dividing as if it was a fertilized egg. The process works flawlessly, except for the fact that the clones inevitably develop symptoms of fatigue and respiratory problems. What is the most likely source of these symptoms?
a. The chemicals used to induce embryo development have damaged the implanted DNA. b. Implanting a nucleus in the egg causes structural weaknesses in the plasma membrane. c. Mitochondria from the egg donor contain a genetic defect that is inherited by the clones. d. Fatigue and respiratory problems are an autoimmune response to foreign DNA.
Sexual reproduction and meiosis generate genetic variety by
A. random fertilization. B. All answers are correct. C. independent assortment. D. crossing over.
A man who is a silent carrier of the FMO3 "fish odor syndrome" has children by a woman who is "normal." Which of the following would best explain how a child born from these parents could have fish odor syndrome?
a) The child inherits two copies of defective FMO3 alleles from its father. b) The mother is also a silent carrier of the defective FMO3 allele. c) FMO3 is x-linked. d) The child has a mutation in one of its cells, making the FMO3 genes defective in those cells. e) The child inherits two copies of defective FMO3 alleles from its mother.
What trait is exhibited only in Homo sapiens and not in other primates in existence today?
A. symbolic language B. opposable thumb C. tool use D. bipedalism