Which of the following statements is true? a) the genotype is the physical appearance of a trait. b) alleles, genes, and loci are different names for the same thing. c) the phenotype of a dominant allele is never seen in the f1 progeny of a monohybrid cross. d) a testcross can be used to determine whether an individual is homozygous or heterozygous for a dominant allele.

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

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