Genetics – Notes
First and Second Laws of Inheritance
Gregor Johann Mendal carried out several hybridisation experiments with true- breeding pea lines which had sharply contrasting characters.
A monohybrid cross is the study of inheritance of one pair of contrasting characters.
The law of Dominance states that a monohybrid, pure line cross between parents with contrasting traits, the dominant form appears in the F1 generation and both forms appear in a ration of 3:1 in the generation.
The law of segregation states that alleles do not show any blending but segregate from each other during gamete formation into different gametes.
Punnett Square is a graphical representation that helps calculate the probability of all possible genotypes of the progeny in a genetic cross.