Which factor has the greatest influence on the expression of a genetic disorder such as Prader-Willi syndrome or Angelman syndrome through the process of genomic imprinting?
A. Paternal age at time of conception
B. Maternal age at time of conception
C. The gender of the parent transmitting the deletion
D. The number of bases deletion from the chromosome
C) the gender of the parent transmitting the deletion
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A mutation causes a gene to become overactive, contributing to uncontrolled cell growth. Which term best describes this gene?
A. tumor-suppressor gene B. oncogene C. spliced gene D. alternatively spliced gene E. malignant gene
Which organ lies in the pelvic cavity?
a. stomach b. bladder c. liver d. large intestine e. heart
In the United States, purple loosestrife, Japanese and Amur honeysuckle, Australian Melaleuca, and Brazilian pepper are all:
A) native flowering plants nearly brought to extinction by consumption by exotic insects. B) native flowering plants nearly brought to extinction by competition from exotic plants. C) exotic flowering plants that have caused relatively few problems for native species. D) exotic flowering plants that have caused significant problems for native species.
If a scientist changed a cell's ionic composition and complementarity between DNA strands could no longer occur, what would the scientist first detect?
A) cell membranes would become less permeable B) RNA would start binding to DNA C) DNA strands become shorter D) ribosomes would move into the nucleus E) DNA becomes single stranded