CannabisGrowBible

Now up until this point he did not know

which trait from which plant was recessive or

dominant. But since all the seeds where solid,

then he knew that Pea Plant#1 contained the

dominant genotype for seed shape and that Pea

Plant#2 contained the recessive genotype for

wrinkled seeds. Also he knew that Pea Plant#2

contained the recessive genotype for seed

shape. This means that in future TEST CROSSES

with other pea strains, he could determine if a

seed shape trait is Homozygous or Heterozygous

because he had identified the recessive trait

(ss).

Remember the rule of test crossed to

determine this? Here it is again.

1. The plant with the dominant trait is always
   crossed with an organism with the recessive
   trait.


2. If ANY offspring show the recessive trait,
   the unknown genotype is heterozygous


3. If ALL the offspring have the dominant
   trait, the unknown genotype is homozygous
   dominant


4. Large numbers are needed for reliable
   results.

(^) s s
S Ss Ss
S Ss Ss