A hereditary disease which is never passed on from father to son is

In Lathyrus odoratus, hybrid blue flowered and long pollen plant is test crossed with homozygous recessive red flowered and round pollen plant then how many parental types are obtained when genes are present in cis stage in parents?

Philadelphia chromosome is

Fruit colour in squash is an example of

How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting tralts$?$