Question

How self-breeding a yellow plant for 10 generations, and seeing only yellow plants, proves that the original plant was homozygous.

Please explain for me:

Answer 1

its basically saying that they have a yellow plant that has not changed in any way for 10 generations, therefore they think that its not a special plant and that it was always a yellow plant (or it was planted intending on it being a yellow plant)

Step-by-step explanation:

Answer 2

A Punnett square can be used to predict genotypes (allele combinations) and phenotypes (observable traits) of offspring from genetic crosses. A test cross can be used to determine whether an organism with a dominant phenotype is homozygous or heterozygous.

Step-by-step explanation: