Question

A cross was carried out between two pea plants showing the contrasting traits of height of the plant. The result of the cross showed $50$ of parental characters. (i) workout the cross with the help of Punnett square. (ii) Name the type of cross carried out.

Answer 1

If the cross is carried out between a homozygous recessive organism and another organism showing the dominant phenotype and the organism showing the dominant phenotype has a heterozygous genotype for the trait then the resulting F1 generation will have half of the organisms of the dominant phenotype (i.e 50%) and the other half of the recessive phenotype. So, both the parental characters will be seen. It can be shown by means of a Punnett square as shown in the image. (ii) The cross carried out is a test cross.