Figure 2-8. Round (R /R or R /r ) and wrinkled (r /r ) peas in a pod of a selfed heterozygous plant (R /r ).

Figure 2-8

Round (R /R or R /r ) and wrinkled (r /r ) peas in a pod of a selfed heterozygous plant (R /r ). The phenotypic ratio in this pod happens to be precisely the 3:1 ratio expected on average in the progeny of this selfing. (Molecular studies have shown that the wrinkled allele used by Mendel is produced by insertion into the gene of a segment of mobile DNA of the type to be discussed in Chapter 20 .) (Madan K. Bhattacharyya.)

From: Mendel’s experiments

Cover of An Introduction to Genetic Analysis
An Introduction to Genetic Analysis. 7th edition.
Griffiths AJF, Miller JH, Suzuki DT, et al.
New York: W. H. Freeman; 2000.
Copyright © 2000, W. H. Freeman and Company.

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