Homozygotes for hemoglobin C have
A) sickle cell disease.
B) a normal phenotype.
C) a bluish complexion.
D) a black mouth.
B) a normal phenotype.
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The digestive system is concerned with
(a) blood circulation. (b) digestion and the absorption of nutrients. (c) reproduction. (d) excretion of urine.
Without the SRY gene, humans and other mammals would develop and retain the female sex organs and phenotype
A. true B. false
Red coat is dominant in horses and white coat is recessive. In a cross between a homozygous dominant red-coated
horse and a white-coated horse, what genotype(s) would be observed in the offspring?
a. all homozygous recessive b. all homozygous dominant c. half homozygous dominant and half homozygous recessive d. all heterozygous e. half heterozygous and half homozygous dominant
Based on their experiment with T2 bacteriophages, Hershey and Chase concluded that
A. virulent bacteria can transform nonvirulent bacteria. B. DNA replication is semiconservative. C. A always pairs with T and G always pairs with C. D. DNA functions as the genetic material. E. the phage coat contains the genetic material.