. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. LINKAGE RELATIONS IN MEN DELI SM 119 of chromatin have occurred which affect the relations of the factors to each other, so that this type of separation after synapsis gives the non- cross-over gametes (^umiB'X) and {WMh'X). Types B and C involve single breaks in the chromosomes followeil bj^ chromatin interchange in reunion. They are the single cross-overs and give the cross-over gametes. B Fig. bb.—Diagram to show crossing-over in a three-factor experiment. (wMh'X) and {WmB'
. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. LINKAGE RELATIONS IN MEN DELI SM 119 of chromatin have occurred which affect the relations of the factors to each other, so that this type of separation after synapsis gives the non- cross-over gametes (^umiB'X) and {WMh'X). Types B and C involve single breaks in the chromosomes followeil bj^ chromatin interchange in reunion. They are the single cross-overs and give the cross-over gametes. B Fig. bb.—Diagram to show crossing-over in a three-factor experiment. (wMh'X) and {WmB'X) and ^wmh'X) and [WMB'X) respectively. Finally in type D tlie chromosomes have broken and exchanged material at two points. This type is called double crossing-over and results in the production of gametes of the genetic constitutions {loMB'X) and {Wmb'X). In this last case, although chromatin interchange has occurred between the two chromosomes, the relations between the loci W and B' remain unchanged. Digitized by Microsoft®. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Babcock, E. B. (Ernest Brown), b. 1877; Clausen, Roy Elwood, 1891-. New York, McGraw-Hill; [etc. , etc. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksu, booksubjectplantbreeding
