(A)Has been restricted to the sex chromosomes because of the small family sizes
(B)Proceeded much more successfully as the large number of DNA markers became availableCorrect
(C)Has determined that the number of linkage groups is about twice the number of chromosomes
(D)Has determined that almost all of the DNA is involved in the coding of genes
Answer: (B)
Solution
Human genetic mapping advanced rapidly once large numbers of DNA markers (RFLPs, microsatellites, SNPs) became available for linkage and physical mapping, so
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