A Closer Look at Monohybrid Cross in Genetics
Understanding Monohybrid Cross in Genetics
A monohybrid cross looks at a single trait.
Explanation:
Monohybrid cross happens between two organisms who have variations in the traits. The alleles will be either dominant or recessive. It is generally done in the first filial generation which differs in one trait. In this cross, a single gene controls the single traits as two variants.
Monohybrid cross is helpful in determining the dominant character of an allele.
A cross between a short pea plant and a tall pea plant.
Tall TT = Dominant
Short tt = Recessive
Punnet square:
T T
t Tt Tt Parental Generation
t Tt Tt
For F1 GENERATION cross between parental generation:
T t
T TT Tt
t Tt tt 3:1 is the phenotype ratio
It can be concluded that tall is the dominant trait expressed. This is law of Dominance.
What is the purpose of a monohybrid cross in genetics? The purpose of a monohybrid cross in genetics is to study the inheritance pattern of a single trait controlled by a single gene with two variants, one dominant and one recessive. It helps determine the dominant character of an allele and understand the law of dominance in genetic inheritance.