genetic laws
by drew brockwell
1.) Law of Segregation
2.) Law of Dominance
3.) Law of Independent Assortment
2.) Law of Dominance
3.) Law of Independent Assortment
Mendel used pea pods to learn more about genetics. When he combined the green pea and yellow pea all of the baby peas turned out to be yellow. When the baby peas had babies there was a 3-1 ratio of yellow. Most of these pea plants turned yellow because yellow is the more dominant gene.
As you can see in this picture above the only way for mendel to have a green pea pod is if he had to green alles. If there was any other combination it would make a yellow pea.
According to the principle of segregation, for any particular trait, the pair of alleles of each parent separately and only one allele passes from each parent on to an offspring. Which allele in a parent's pair of alleles is inherited is a matter of chance. We now know that this segregation of alleles occurs during the process of sex cell formation.
As you can see in this picture above the only way for mendel to have a green pea pod is if he had to green alles. If there was any other combination it would make a yellow pea.
According to the principle of segregation, for any particular trait, the pair of alleles of each parent separately and only one allele passes from each parent on to an offspring. Which allele in a parent's pair of alleles is inherited is a matter of chance. We now know that this segregation of alleles occurs during the process of sex cell formation.
Segregation of alleles in the production of sex cells
According to the principle of independent assortment, different pairs of alleles are passed to offspring independently of each other. The result is that new combinations of genes present in neither parent are possible. For example, a pea plant's inheritance of the ability to produce purple flowers instead of white ones does not make it more likely that it will also inherit the ability to produce yellow pea seeds in contrast to green ones.
According to the principle of independent assortment, different pairs of alleles are passed to offspring independently of each other. The result is that new combinations of genes present in neither parent are possible. For example, a pea plant's inheritance of the ability to produce purple flowers instead of white ones does not make it more likely that it will also inherit the ability to produce yellow pea seeds in contrast to green ones.