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Images Dated 9th February 2004

Available as Framed Photos, Photos, Wall Art and Gift Items

Choose from 18 pictures in our Images Dated 9th February 2004 collection for your Wall Art or Photo Gift. Popular choices include Framed Photos, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for quick delivery.


Mendels peas Featured 9 Feb 2004 Print

Mendels peas

Mendel's peas. Historical artwork of the peas (Pisum sp.) used by Gregor Mendel (1822-1884) in his experiments into heredity. He cross-bred peas that produced yellow (A) and green (B) peas. This produces a generation in which the peas are yellow (C). This is because the colour of the peas is controlled by an allele in which yellow colour is dominant. An allele is a pair of genes that have different effects on the same characteristic, for instance controlling pea colour. By breeding the C generation peas together, Mendel found that the next generation had a mixture of pea colours (D). The ratio of yellow to green peas was 3:1. His work formed the basis of genetic theory

© SHEILA TERRY/SCIENCE PHOTO LIBRARY