Phenotype means Select one:
a. the combination of alleles in an individual.
b. the genes an individual has.
c. the number of chromosomes in an individual.
d. the observable expression of the genes in an individual.
e. the number of gametes in an individual.
d. the observable expression of the genes in an individual.
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Which of the following statements about hemoglobin is false?
A. Hemoglobin is only found within blood cells in animal bodies. B. Hemoglobin increases the amount of oxygen in vertebrate blood one hundredfold. C. The similarity of vertebrate and invertebrate hemoglobins suggest that a shared form of hemoglobin evolved in a common ancestor of these lineages. D. Some plants use hemoglobin to bind oxygen in order to keep cellular concentrations low. E. All of the answer options are correct.
Each new DNA strand starts at an ______ synthesized by ______
Fill in the blank(s) with the appropriate word(s).
What major advantage is conveyed by having a system of adaptive immunity?
A) It enables a rapid defense against an antigen that has been previously encountered. B) It enables an animal to counter most pathogens almost instantly the first time they are encountered. C) It results in effector cells with specificity for a large number of antigens. D) It allows for the destruction of antibodies.
The actions of Xist result in an organism that is a phenotypic mosaic.
Answer the following statement true (T) or false (F)