If a human zygote has either 45 or 47 chromosomes it was caused by random fertilization.
a. true
b. false
b. false
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________ is the polysaccharide most commonly found in highly fibrous foods such as celery.
A. Chitin B. Cellulose C. Glycogen D. Starch
The most common form of hemophilia is a defect in blood clotting factor VIII, which is caused by a recessive form of a gene carried on the X chromosome. A girl is born with hemophilia. Both parents have normal phenotype
Which of the following might explain this girl's hemophilia? A. A nondisjunction event in sperm production resulted in her receiving X and Y chromosomes from her father, and an X from her mother; she is XXY. B. Nondisjunction during egg formation resulted in her receiving no X chromosome from her mother, but an X from her father; she is XO. C. Nondisjunction during sperm formation resulted in her receiving no sex chromosome from her father and an X chromosome from her mother; she is XO. D. Nondisjunction during egg formation resulted in her receiving two X chromosomes from her mother and an X chromosome from her father; she is XXX. E. She inherited an X chromosome from her father and the X carrying the defective allele from her mother.
Which statement about clinical identification tests is true?
A. Microarray tests are based on electrophoresis methodology. B. Not all diseases are identified by clinical tests. C. Biochemical tests are quicker than genetic analysis tests. D. Serological tests are always based on identifying antibodies in the patient.
CREB is activated by
a. cAMP binding in the nucleus. b. phosphorylation by protein kinase A in the nucleus. c. cAMP binding in the cytoplasm. d. phosphorylation by protein kinase A in the cytoplasm.