Question

Dueing a monohybrid cross involving a tall pea plant with a dwarf pea palnt the offspring population were tall and dwarf in equal ratio work out a cross to show how it is possible

Answer 1

This is a monohybrid cross which is the study of inheritance of one pair of contrasting characters. Through monohybrid cross experiments, Mendel proposed the Laws of Dominance and Law of segregation.

Test cross is a cross between F1 generation individual and the homozygous recessive parent. This helps in obtaining 50% of domonant individuals and 50% recessive individuals. Test cross helps in determining the genotype of the dominant individual.

Tt X tt -------> 50%Tt     +   50% tt

Test cross is the cross in which the offspring formed have a phenotypic ratio of  1:1   i.e. 50%: 50%. This is a cross which is used to determine an individual to be homozygous or heterozygous in its condition.