True or False: Sickle-cell disease is a recessive disease. This means that two individuals without the disease cannot have a child with the disease. Only parents with the disease can pass it on.
Answer the following statement true (T) or false (F)
False
This statement is false. Sickle-cell is a recessive disease, meaning that both parents can be healthy but also be carriers of the recessive allele. In this way, they may have a child that received a recessive allele from each of them and that has the disease.
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Which of the following describes the property shared by elements within the same column (or group) in the periodic table of elements?
a. Elements within the same group have the same electrical charge. b. Elements within the same group have the same number of neutrons in their nuclei. c. Elements within the same group share the same electron configuration in their valence shells. d. Elements within the same group have the same atomic radius.
When Tanous exercises, his muscles need a greater flow of blood. Which of the following substances are the muscles likely to secrete locally?
A) nitric oxide B) histamine C) prostaglandins D) growth hormone
Groups of related, but distinctly different genes that appear to have arisen from a single ancestral gene are referred to as
A. segmental duplications. B. expressed sequences. C. tandem clusters. D. pseudogenes. E. multigene families.
DNA codes for the production of
a. proteins. b. minerals. c. inorganic molecules. d. vital gasses. e. water.