In genetics, the use of chequer board was done by
Mendel
Correns
Punnet
Darwin
When an individual is having both the alleles of a contrasting character, it is said to be
Definitions / Explanation : Test cross
In Mendel's experiment nature of seed coat, flower colour, position of flower, pod colour, stem height etc. are reffered to as
Test cross in plants or in Drosophila involves crossing
Mendel's principle of segregation means that the germ cells always receive