Mendel´s+law

__**MENDEL LAWS: **__

__** Mendel´s First Law or the uniformity of the first filial generation **__ By crossing a homozygotic plant with yellow seeds with another which was also homozygotic, but with green seeds, the resulting plants only produced yellow seeds (100% yellow seeds). The colour of seed character is inherited by means of a pair of alleles, one dominant, A, and the other recesive, a, which corresponds to green. The dominant allele does not allow the expression of the recessive allele.

__**Mendel´s Second Law ( segregation of traits in the second filial generation) **__  By crossing the descendants obtained (F 1), Mendel found that two kinds of seeds appeared in the second generationF2, three yellow and one green, 3:1. The green seeds appeared again. F1 generation were heterozygotic, Aa, and produced gametes of two kinds, A and a. **During the process of fertilisation of the gametes, they segregated, or separated **. __**Mendel´s Third Law (independent combination of traits). **__ Mendel studied the behaviour of two characters at the same time, colour (yellow or green) and the texture of the surface (smooth or rough) and found that: AABB / aabb, the F1 he obtained uniform descendants which were yellow and smooth AaBb. By crossing AaBb between them, in the F2, he obtained all the possible combinations of phenotypes in the following proportion: 9,3,3,1