A chart depicting Mendel’s Law of Dominance
Reviewed by: Mary Anne Clark, Ph.D.
The previous tutorial, Dominance, has described Gregor Mendel’s law of dominance. In this tutorial, you will learn another Mendel’s law — the principle of segregation.
The following dihybrid cross involves two true-breeding pea plants, where two factors are looked at, the shape of the seed and the color of the seed.
More examples of dihybrid cross here.
The past few pages have elaborated on the work of Gregor Mendel and how his work has paved the way for predicting the characteristics of offspring. However, a degree of randomness is involved, when involving factors such as independent assortment during meiosis and the possibility of genetic mutations (explained in further pages).
In light of this, Mendel’s work allowed us to see that there is a degree of genetic inheritance from parents in offspring though modern biology indicates that more factors come into play to determine the final genotype and phenotype of an organism.
Sticking to the subject of genetics, the next tutorial looks at sex determination via chromosomes X and Y and some of the genetic traits inherited via these two chromosomes.
|MENDEL’S PRINCIPLES OF HEREDITY – QUIZ |
Print this quiz for your students to answer. The first part is a recall of Gregor Mendel’s principles of heredity. The second part is a multiple-choice test about alleles and sex chromosomes.
Gregor Mendel's studies into Monohybrid and Dihybrid crossing and Charles Darwin's study of evolution and natural select..
DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxy..
This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..
This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..