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| Description: In the cross on the left, a homozygous male with the normal Igf2 allele is crossed to a homozygous female carrying a defective allele, Igf2?. An offspring is phenotypically normal because the paternal allele is expressed. In the cross on the right, a homozygous male carrying the defective allele is crossed to a homozygous normal female. In this case, an offspring is dwarf because the paternal allele is defective and the maternal allele is not expressed.
Picture Stats: Views: 1236 Filesize: 41.63kB Height: 323 Width: 850 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=541 Keywords: An example of genomic imprinting in the mouse. |