Cri-du-chat syndrome is caused by a deletion on chromosome 5; deletions occur when _____.
A) a portion of a chromosome is relocated onto a second chromosome
B) homologous chromosomes fail to separate during meiosis
C) a portion from the end or within the middle is lost
D) a son inherits a defective X chromosome from his mother
E) a section of chromosome breaks free but is reconnected to its chromosome in reverse order
Ans: C) a portion from the end or within the middle is lost
You might also like to view...
To which class of neurotransmitters does glutamate belong?
a. acetylcholine b. monoamines c. amino acids d. neuropeptides e. gaseous neurotransmitters
After completing the nucleotide sequence of a microbial genome, computer translation of the DNA sequence allows enzymes to be identified based on a short pattern of amino acid sequence called a contig that corresponds to the active site of the enzyme.
Answer the following statement true (T) or false (F)
An examples of a plant disease caused by an ascomycete is:
a. a microsporidial infection. b. stem rust of wheat. c. histoplasmosis. d. chestnut blight. e. corn smut.
Which of the following genes would be a not be good candidate to be used as a reporter gene in plants:
A) An alpha amylase gene from frogs B) An Alcohol Dehydrogenase (ADH) gene from human. C) A gene encoding a protein involved in routine photosynthesis. D) All of the above