Question

fredmuga:give the exemption of Mendel principles of genetics

Answer 1

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Answer 2

Mendel assumed that all genes inherit separately and each one behaves as an independent unit. However there are few genes that do not follow this assumption, instead they tend to inherit together. This phenomenon is called linkage. These genes do not follow mendel's laws.

Mendel also believed that out of two alleles present for any one phenotype, one allele exerts absolute dominance over the other. But there are alleles of some genes which do not exert absolute dominance but instead they both tend to exert their partial effect on the phenotype. This is called co dominance. for example a cross between plants having red and white flowers, producing offsprings having pink flowers. This is also something that does not follow mendel's laws.

Answer 3

http://anthro.palomar.edu/mendel/mendel_3.htm
http://en.wikipedia.org/wiki/Gregor_Mendel