Sanjay and Indira have thalassemia minor. Their young daughters are dizygotic (fraternal) twins. Malonie has thalassemia minor like her parents, but Jewel has the more severe thalassemia major. The more serious case most likely arose because
A) Jewel inherited two wild type alleles from her carrier parents.
B) Jewel inherited a dominant form of the condition.
C) Jewel inherited two recessive mutant alleles in the beta globin gene that cause thalassemia.
D) Jewel also has sickle cell disease.
C) Jewel inherited two recessive mutant alleles in the beta globin gene that cause thalassemia.
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Humans have __________ different types of autosomes.
A. 46 B. 44 C. 23 D. 22 E. 11
A particular characteristic of disease-causing Streptococcus is
A. catalase production. B. beta-hemolysis. C. lactic acid production. D. growth at refrigerator temperatures.
The main purpose of fermentation reactions is to
a. produce ATP. b. regenerate the electron carriers needed for glycolysis. c. produce the building blocks for biological molecules. d. prepare the pyruvate for the Krebs cycle. e. provide various products useful for man.
The fact that water is less dense as a solid than as a liquid explains why:
A) water is such a good solvent. B) water can resist temperature changes. C) ice floats on top of liquid water. D) ice cubes sink when placed in a glass of water. E) oil never dissolves in water.