Question

1. Compare and contrast epigenetic, Mendelian genetic and Lamarckian theories of inheritance. 2. Discuss how it...

1. Compare and contrast epigenetic, Mendelian genetic and Lamarckian theories of inheritance.

2. Discuss how it is possible that in your body, every cell has identical DNA and the same genes, yet these cells may have very different phenotypes and functions throughout the body (for example, in your body, a neuron and cardiac muscle cells have the same genes, yet very different functions and appearances).

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Answer #1

Ans 1:

Epigenetic theory of Inheritance: it states that traits are passed from one generation to next without changes in DNA sequence.

Mendel's theory of Inheritance: It states that traits are passed from one generation to next via certain discrete factors (genes) and transmission of one factor is independent of the other.

Lamarckian theory of Inheritance: it states that acquired traits of one generation are passed on to next generation.

Ans 2: Different cells have the same DNA and set of genes , yet they have different roles and Phenotype because only certain genes are specifically activated in a cell and , different genes are active in different cells . Thus they make different products (protein) and express different phenotype.

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