Define the term translocation and describe the two major types and their phenotypic consequences
What will be an ideal response?
Translocations move part of a chromosome to another, nonhomologous chromosome. There are two major types of translocations: reciprocal translocations and Robertsonian translocations. In a reciprocal translocation, two nonhomologous chromosomes exchange parts. No genetic information is gained or lost from the cell in the exchange, but genes are moved to new chromosomal locations. In some cases, there are no phenotypic effects, and the translocation is passed through a family for generations. Robertsonian translocations can produce genetically unbalanced gametes with duplicated or deleted chromosomal segments that can result in embryonic death or abnormal offspring.
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What are the specific environmental consequences of a phytoplankton bloom?
a. An increase in phytoplankton acidifies ocean water. b. Phytoplankton are decomposed by aerobic bacteria, which depletes the surrounding water of oxygen. c. Phytoplankton fix nitrogen in the water causing nitrification. d. Phytoplankton are decomposed by anaerobic bacteria which enriches the surrounding water with oxygen. e. Phytoplankton use up hydrogen ions, which decreases the acidity of the surrounding water.
In the garden peas example above, a tall plant with purple flowers crossed with a tall plant with white
flowers produces 3/8 tall purple flowers, 1/8 tall white flowers, 3/8 dwarf purple flowers, and 1/8 dwarf white flowers. What is the genotype of the parents? What will be an ideal response?
Which includes one of the others as a specific type?
A. T cells B. macrophages C. B cells D. plasma cells E. neutrophils
The outside of a neuron is positively charged at resting potential. Why don't negative ions exit from the cell to normalize charge across the membrane?
A. All of the chloride ions are already outside the cell. B. The negative charge inside the cell is carried by large proteins that cannot diffuse through the membrane. C. There are no negative ions inside the cell. D. The positive charge outside the cell repels negative ions.